No internet connection after installing yosemite

After installing Yosemite, I have no internet connection. If I hold option key, my wifi description shows Internet as unreachable,although all my bars are dark and the rest of the settings look the same. When I connected via cable, it did not show an Ethernet connection. My pc and iPad work fine,so it isn't my carrier. Anyone else have this problem and know a fix??? Thanks so much for any assistance..

You are on to something here.
I tried unloading, and it was not found. I then loaded the file, and magically all my apple apps made their network connections and started working.
But here's where it gets funny.
I logged off, and into another use account and I had no network connection.
I logged back into my account, and had no network connection. I needed to unload and load the file again for the network to return.
More troubleshooting ahead...

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Lots of people are having the same problem, you're not the only one, belieeeeve me.
Just Googling the problem gets you tons of people complaining about the same thing, SOMETHING is up with Lion what wasn't happening with Snow Leopard. i just bought a new Imac and it CAME with Lion, so i started experiencing this internet dropout immediately.
It's been going on for the most of a year it looks like (at least by the dates from the threads i've been reading)
So your best bet is to fiddle with the System Preferences and read what other people have used to make theirs work. i'm doing that myself right now. I already posted a similar thread last night trying to figure out why my connection kept on dropping, i got a reply which linked me to a site. i followed the instructions there, so far so good, but i'm just being cautiously optimistic.
i'm gonna call Apple today and see if they've found anything, though seeing as this is a problem right out of the box there may not be an immediate solution. Good luck hunting for a solution :3
Site:
http://osxdaily.com/2011/11/06/lion-wi-fi-problems-solution-mac/?utm_source=feed burner&utm_medium=feed&utm_campaign=Feed%3A+osxdaily+%28OS+X+Daily%29&utm_conten t=FaceBook

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Hi
Have a look to see if this helps HERE//
(If I have helped you in any way to say "Thank You" please click on the star next to the message. Thank You)
If I have solved your Issue please click the "Mark as accepted solution" button.

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1. This procedure is a diagnostic test. It changes nothing, for better or worse, and therefore will not, in itself, solve the problem. But with the aid of the test results, the solution may take a few minutes, instead of hours or days.
The test works on OS X 10.7 ("Lion") and later. I don't recommend running it on older versions of OS X. It will do no harm, but it won't do much good either.
Don't be put off by the complexity of these instructions. The process is much less complicated than the description. You do harder tasks with the computer all the time.
2. If you don't already have a current backup, back up all data before doing anything else. The backup is necessary on general principle, not because of anything in the test procedure. Backup is always a must, and when you're having any kind of trouble with the computer, you may be at higher than usual risk of losing data, whether you follow these instructions or not.
There are ways to back up a computer that isn't fully functional. Ask if you need guidance.
3. Below are instructions to run a UNIX shell script, a type of program. As I wrote above, it changes nothing. It doesn't send or receive any data on the network. All it does is to generate a human-readable report on the state of the computer. That report goes nowhere unless you choose to share it. If you prefer, you can act on it yourself without disclosing the contents to me or anyone else.
You should be wondering whether you can believe me, and whether it's safe to run a program at the behest of a stranger. In general, no, it's not safe and I don't encourage it.
In this case, however, there are a couple of ways for you to decide whether the program is safe without having to trust me. First, you can read it. Unlike an application that you download and click to run, it's transparent, so anyone with the necessary skill can verify what it does.
You may not be able to understand the script yourself. But variations of it have been posted on this website thousands of times over a period of years. The site is hosted by Apple, which does not allow it to be used to distribute harmful software. Any one of the millions of registered users could have read the script and raised the alarm if it was harmful. Then I would not be here now and you would not be reading this message. See, for example, this discussion.
Nevertheless, if you can't satisfy yourself that these instructions are safe, don't follow them. Ask for other options.
4. Here's a summary of what you need to do, if you choose to proceed:
☞ Copy a line of text in this window to the Clipboard.
☞ Paste into the window of another application.
☞ Wait for the test to run. It usually takes a few minutes.
☞ Paste the results, which will have been copied automatically, back into a reply on this page.
The sequence is: copy, paste, wait, paste again. You don't need to copy a second time. Details follow.
5. Try to test under conditions that reproduce the problem, as far as possible. For example, if the computer is sometimes, but not always, slow, run the test during a slowdown.
You may have started up in "safe" mode. If the system is now in safe mode and works well enough in normal mode to run the test, restart as usual. If you can only test in safe mode, do that.
6. If you have more than one user, and the one affected by the problem is not an administrator, then please run the test twice: once while logged in as the affected user, and once as an administrator. The results may be different. The user that is created automatically on a new computer when you start it for the first time is an administrator. If you can't log in as an administrator, test as the affected user. Most personal Macs have only one user, and in that case this section doesn’t apply. Don't log in as root.
7. The script is a single long line, all of which must be selected. You can accomplish this easily by triple-clicking anywhere in the line. The whole line will highlight, though you may not see all of it in the browser window, and you can then copy it. If you try to select the line by dragging across the part you can see, you won't get all of it.
Triple-click anywhere in the line of text below on this page to select it:
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NR>1&&$NF!~/0x|\.([0-9]{3,}|[-0-9A-F]{36})$/ { print $NF"\f"a[split($(NF-1),a," ")];} ' '|tail -n'{${p[6]},${p[10]}} ' s/.+bus /Bus: /;s/,.+[(]/ /;s/,.+//p;' ' { $NF=$NF" Errors: "$1;$1="";} 1 ' ' 1s/^/\'$'\n''/;/^ +(([MNPRSV]|De|Li|Tu).+|Bus): .|d: Y/d;s/:$//;$d;p;' ' BEGIN { RS=",";FS=":";} $1~"name" { gsub(/["\\]/,"",$2);print $2;} ' '|grep -q e:/' '/[^ .]/p' '{ print $1}' ' /^ +N.+: [1-9]/ { i++;} END { if(i) print "system: "i;} ' ' NF { print "'{admin,user}' "$NF;exit;} ' ' /se.+ =/,/[\}]/!d;/[=\}]/!p ' ' 3,4d;/^ +D|Of|Fu| [0B]/d;s/^ |:$//g;$!H;${ x;/:/p;} ' ' BEGIN { FS=": ";} NR==1 { sub(":","");h="\n"$1"\n";} /:$/ { l=$1;next;} $1~"S"&&$2!~3 { getline;next;} /^ {6}I/ { i++;L[i]=l" "$2;} END { if(i) print h;for(j=0;j<'${p[24]}';j++) print L[i-j];} ' ' /./H;${ x;s/\n//;s/\n/, /g;/,/p;} ' ' {if(int($6)>'${p[25]}')printf("swap used %.1f\n",$6/1024)} ' ' BEGIN{FS="\""} $3~/ t/&&$2!~/'{${k[24]},${k[29]}}'/{print $2} ' ' int($1)>13 ' p ' BEGIN{FS="DB="} { sub(/\.db.*/,".db",$2);print $2;} ' {,1d\;}'/r%/,/^$/p' ' NR==1{next} NR>11||!$0{exit} {print $NF"\f"substr($0,1,32)"\f"$(NF-7)} ' '/e:/{print $2}' ' /^[(]/{ s/....//;s/$/:/;N;/: [)]$/d;s/\n.+ ([^ ]+).$/\1/;H;};${ g;p;} ' '1;END { exit "find /var/db/r*/'${k[21]}'*.{BS,Bas,Es,J,OSXU,Rem,up}*.bom -mtime -'${p[23]}'s"|getline;} ' ' NR<='${p[26]}' { o=o"\n"$0;next;} { o="";exit;} END{print o|"sed 1d"} ' ' {o=o"\n"$0} NR==6{p=$1*$5} END{if(p>'${p[27]}'*10^6)print o|"sed 1d"} ' );c1=(system_profiler pmset\ -g nvram fdesetup find syslog df vm_stat sar ps crontab kextfind top pkgutil "${k[30]}\\" echo cksum kextstat launchctl smcDiagnose sysctl\ -n defaults\ read stat lsbom 'mdfind -onlyin' env pluginkit scutil 'dtrace -q -x aggsortrev -n' security sed\ -En awk 'dscl . -read' networksetup mdutil lsof test osascript\ -e netstat mdls route cat uname powermetrics codesign lockstat lpstat );c2=(${k[21]}loginwindow\ LoginHook ' /L*/P*/loginw*' "'tell app \"System Events\" to get properties of login items'" 'L*/Ca*/'${k[21]}'Saf*/E* -d 2 -name '${k[32]} '~ $TMPDIR.. $ -flags +sappnd,schg,uappnd,uchg -o ! -user $UID -o ! -perm -600 $' -i '-nl -print' '-F \$Sender -k Level Nle 3 -k Facility Req "'${k[21]}'('{'bird|.*i?clou','lsu|sha'}')"' "-f'%N: %l' Desktop {/,}L*/Keyc*" therm sysload boot-args status " -F '\$Time \$Message' -k Sender kernel -k Message CRne '0xdc008012|(allow|call)ing|Goog|(mplet|nabl)ed|ry HD|safe b|succ|xpm' -k Message CReq 'bad |Can.t l|corru|dead|fail|GPU |hfs: Ru|inval|Limiti|v_c|NVDA[(]|pa(gin|us)|Purg(ed|in)| err|Refus|s ful|TCON|tim(ed? ?|ing )o|trig|WARN' " '-du -n DEV -n EDEV 1 10' 'acrx -o%cpu,comm,ruid' "' syscall::recvfrom:return {@a[execname,uid]=sum(arg0)} syscall::sendto:return {@b[execname,uid]=sum(arg0)} syscall::open*:entry {@c[execname,uid,copyinstr(arg0),errno]=count()} syscall::execve:return, syscall::posix_spawn:return {@d[execname,uid,ppid]=count()} syscall::fork:return, syscall::vfork:return, syscall::posix_spawn:return /arg0<0/ {@e[execname,uid,arg0]=count()} syscall:::return /errno!=0/ {@f[execname,uid,errno]=count()} io:::wait-start {self->t=timestamp} io:::wait-done /self->t/ { this->T=timestamp - self->t;@g[execname,uid]=sum(this->T);self->t=0;} io:::start {@h[execname,uid]=sum(args[0]->b_bcount)} tick-10sec { normalize(@a,2560000);normalize(@b,2560000);normalize(@c,10);normalize(@d,10);normalize(@e,10);normalize(@f,10);normalize(@g,10000000);normalize(@h,10240);printa(\"1\f%@d\f%s\f%d\n\",@a);printa(\"2\f%@d\f%s\f%d\n\",@b);printa(\"11\f%@d\f%s\f%d\f%s\f%d\n\",@c);printa(\"12\f%@d\f%s\f%d\f%d\n\",@d);printa(\"13\f%@d\f%s\f%d\f%d\n\",@e);printa(\"14\f%@d\f%s\f%d\f%d\n\",@f);printa(\"3\f%@d\f%s\f%d\n\",@g);printa(\"4\f%@d\f%s\f%d\n\",@h);exit(0);} '" '-f -pfc /var/db/r*/'${k[21]}'*.{BS,Bas,Es,J,OSXU,Rem,up}*.bom' '{/,}L*/Lo*/Diag* -type f -regex .\*[cght] ! -name .?\* ! -name \*ag $ -exec grep -lq "^Thread c" {} \; -exec printf \* \; -o -true $ -execdir stat -f'$'\f''%Sc'$'\f''%N -t%F {} \;' '/S*/*/Ca*/*xpc*' '-L /{S*/,}L*/StartupItems -type f -exec file {} +' /\ kMDItemContentTypeTree=${k[21]}{bundle,mach-o-dylib} :Label "/p*/e*/{auto*,{cron,fs}tab,hosts,{[lp],sy}*.conf,mach_i*/*,pam.d/*,ssh{,d}_config,*.local} {/p*,/usr/local}/e*/periodic/*/* /L*/P*{,/*}/com.a*.{Bo,sec*.ap}*t {/S*/,/,}L*/Lau*/*{,/*} .launchd.conf" list '-F "" -k Sender hidd -k Level Nle 3' /Library/Preferences/${k[21]}alf\ globalstate --proxy '-n get default' vm.swapusage --dns -get{dnsservers,info} dump-trust-settings\ {-s,-d,} '~ "kMDItemKind=Package"' '-R -ce -l1 -n5 -o'{'prt -stats prt','mem -stats mem'}',command,uid' -kl -l -s\ / '--regexp --files '${k[21]}'pkg.*' '+c0 -i4TCP:0-1023' ${k[21]}dashboard\ layer-gadgets '-d /L*/Mana*/$USER' '-app Safari WebKitDNSPrefetchingEnabled' '-Fcu +c0 -l' -m 'L*/{Con*/*/Data/L*/,}Pref* -type f -size 0c -name *.plist.???????' kern.memorystatus_vm_pressure_level '3>&1 >&- 2>&3' '-F \$Message -k Sender kernel -k Message CReq "'{'n Cause: -','(a und|I/O |gnment |jnl_io.+)err|disk.+abo','USBF:.+bus'}'"' -name\ kMDItem${k[33]} -T\ hfs '-n get default' -listnetworkserviceorder :${k[33]} :CFBundleDisplayName $EUID {'$TMPDIR../C ','/{S*/,}'}'L*/{,Co*/*/*/L*/}{Cache,Log}s -type f -size +'${p[11]}'M -exec stat -f%z'$'\f''%N {} \;' \ /v*/d*/*/*l*d{,.*.$UID}/* '-app Safari UserStyleSheetEnabled' 'L*/A*/Fi*/P*/*/a*.json' users/$USER\ HomeDirectory '{/,}L*/{Con,Pref}* -type f ! -size 0 -name *.plist -exec plutil -s {} \;' ' -F "\$Time \$(Sender): \$Message" -k Sender Rne "launchd|nsurls" -k Level Nle 3 -k Facility R'{'ne "user|','eq "'}'console" -k Message CRne "[{}<>]|asser|commit - no t|deprec|done |ect pas|fmfd|Goog|ksho|ndum|obso|realp|rned f|/root|sandbox ex" ' getenv '/ "kMDItemDateAdded>=\$time.now(-'${p[23]}')&&kMDItem'${k[33]}'=*"' -m\ / '' ' -F "\$Time \$(RefProc): \$Message" -k Sender Req launchd -k Level Nle 3 -k Message Rne "asse|bug|File ex|hij|Ig|Jet|key is|lid t|Plea|ship" ' print{,-disabled}\ {system,{gui,user}/$UID} '-n1 --show-initial-usage --show-process-energy' -r ' -F "\$Message" -k Sender nsurlstoraged -k Time ge -1h -k Level Nle 4 -k Message Req "^(ER|IN)" ' '/A* -type d -name *.app -prune ! -user 0' -vv '-D1 -IPRWck -s5 sleep 1' -o );N1=${#c2[@]};for j in {0..20};do c2[N1+j]=SP${k[j]}DataType;done;l=({Restricted\ ,Lock,Pro}files POST Battery {Safari,App,{Bad,Loaded}\ kernel,Firefox}\ extensions System\ load boot\ args FileVault\ {2,1} {Kernel,System,Console,launchd}\ log SMC Login\ hook 'I/O per process' 'High file counts' UID {System,Login,Agent,User}\ services\ {load,disabl}ed {Admin,Root}\ access Font\ issues Firewall Proxies DNS TCP/IP Wi-Fi 'Elapsed time (sec)' {Root,User}\ crontab {Global,User}' login items' Spotlight Memory\ pressure Listeners Widgets Parental\ Controls Prefetching Nets Volumes {Continuity,I/O,iCloud,HID,HCI}\ errors {User,System}\ caches/logs XPC\ cache Startup\ items Shutdown\ codes Heat Diagnostic\ reports Bad\ {plist,cache}s 'VM (GiB)' Bundles{,' (new)'} Trust\ settings Activity Free\ space Stylesheet Library\ paths{,' ('{shell,launchd}\)} Data\ packages Modifications CUPS );N3=${#l[@]};for i in {0..8};do l[N3+i]=${k[5+i]};done;F() { local x="${s[$1]}";[[ "$x" =~ ^([\&\|\<\>]|$) ]]&&{ printf "$x";return;};:|${c1[30]} "$x" 2>&-;printf "%s \'%s\'" "|${c1[30+$?]}" "$x";};A0() { Q=6;v[2]=1;id -G|grep -qw 80;v[1]=$?;((v[1]))||{ Q=7;sudo -v;v[2]=$?;((v[2]))||Q=8;};v[3]=`date +%s`;date '+Start time: %T %D%n';printf '\n[Process started]\n\n'>&4;printf 'Revision: %s\n\n' ${p[0]};};A1() { local c="${c1[$1]} ${c2[$2]}";shift 2;c="$c ` while [[ "$1" ]];do F $1;shift;done`";((P2))&&{ c="sudo $c";P2=;};v=`eval "$c"`;[[ "$v" ]];};A2() { local c="${c1[$1]}";[[ "$c" =~ ^(awk|sed ) ]]&&c="$c '${s[$2]}'"||c="$c ${c2[$2]}";shift 2;local d=` while [[ "$1" ]];do F $1;shift;done`;((P2))&&{ c="sudo $c";P2=;};local a;v=` while read a;do eval "$c '$a' $d";done<<<"$v";`;[[ "$v" ]];};A3(){ v=$((`date +%s`-v[3]));};export -f A1 A2 F;B1() { v=No;! ((v[1]))&&{ v=;P1=1;};};eval "`type -a B1|sed '1d;s/1/2/'`";B3(){ v[$1]="$v";};B4() { local i=$1;local j=$2;shift 2;local c="cat` while [[ "$1" ]];do F $1;shift;done`";v[j]=`eval "{ $c;}"<<<"${v[i]}"`;};B5(){ v="${v[$1]}"$'\n'"${v[$2]}";};B6() { v=` paste -d$'\e' <(printf "${v[$1]}") <(printf "${v[$2]}")|awk -F$'\e' ' {printf("'"${f[$3]}"'",$1,$2)} ' `;};B7(){ v=`egrep -v "${v[$1]}"<<<"$v"|sort`;};eval "`type -a B7|sed '1d;s/7/8/;s/-v //'`";C0() { [[ "$v" ]]&&sed -E "$s"<<<"$v";};C1() { [[ "$v" ]]&&printf "${f[$1]}" "${l[$2]}" "$v"|sed -E "$s";};C2() { v=`echo $v`;[[ "$v" != 0 ]]&&C1 0 $1;};C3() { B4 0 0 63&&C1 1 $1;};C4() { echo $'\t'"Part $((++P)) of $Q done at $((`date +%s`-v[3])) sec">&4;};C5() { sudo -k;pbcopy<<<"$o";printf '\n\tThe test results are on the Clipboard.\n\n\tPlease close this window.\n';exit 2>&-;};for i in 1 2;do eval D$((i-1))'() { A'$i' $@;C0;};';for j in 2 3;do eval D$((i+2*j-3))'() { local x=$1;shift;A'$i' $@;C'$j' $x;};';done;done;trap C5 2;o=$({ A0;D0 0 N1+1 2;D0 0 $N1 1;B1;C2 31;B1&&! B2&&C2 32;D2 22 15 63;D0 0 N1+2 3;D0 0 N1+15 17;D4 3 0 N1+3 4;D4 4 0 N1+4 5;D4 N3+4 0 N1+9 59;D0 0 N1+16 99;for i in 0 1 2;do D4 N3+i 0 N1+5+i 6;done;D4 N3+3 0 N1+8 71;D4 62 1 10 7;D4 10 1 11 8;B2&&D4 18 19 53 67;D2 11 2 12 9;D2 12 3 13 10;D2 13 32 70 101 25;D2 71 6 76 13;D2 45 20 52 66;A1 7 77 14;B3 28;A1 20 31 111;B6 0 28 5;B4 0 0 110;C2 66;B2&&D0 45 90 124;D4 70 8 15 38;D0 9 16 16 77 45;C4;B2&&D0 35 49 61 75 76 78 45;B2&&{ D0 28 17 45;C4;};B2&&{ A1 43 85 117;B3 29;B4 0 0 119 76 81 45;C0;B4 29 0 118 119 76 82 45;C0;    };D0 12 40 54 16 79 45;D0 12 39 54 16 80 45;D4 78 46 91;D4 74 25 77 15&&{ B4 0 8 103;B4 8 0;A2 18 74;B6 8 0 3;C3 75;};B2&&D4 19 21 0;B2&&D4 40 10 42;D2 2 0 N1+19 46 84;D2 44 34 43 53;D2 59 22 20 32;D2 33 0 N1+14 51;for i in {0..2};do A1 29 35+i 104+i;B3 25+i;done;B6 25 27 5;B6 0 26 5;B4 0 0 110;C2 69;D2 34 21 28 35;D4 35 27 29 36;A1 40 59 120;B3 18;A1 33 60 121;B8 18;B4 0 19 83;A1 27 32 39&&{ B3 20;B4 19 0;A2 33 33 40;B3 21;B6 20 21 3;};C2 36;D4 50 38 5 68;B4 19 0;D5 37 33 34 42;B2&&D4 46 35 45 55;D4 38 0 N1+20 43;B2&&D4 58 4 65 76 91;D4 63 4 19 44 75 95 12;B1&&{ D4 53 5 55 75 69&&D4 51 6 58 31;D4 56 5 56 97 75 98&&D0 0 N1+7 99;D2 55 5 27 84;D4 61 5 54 75 70;D4 14 5 14 96;D4 15 5 72 96;D4 17 5 78 96;C4;};D4 16 5 73 96;A1 13 44 74 18;C4;B3 4;B4 4 0 85;A2 14 61 89;B4 0 5 19 102;A1 17 41 50;B7 5;C3 8;B4 4 0 88;A2 14 24 89;C4;B4 0 6 19 102;B4 4 0 86;A2 14 61 89;B4 0 7 19 102;B5 6 7;B4 0 11 73 102;A1 42 86 114;j=$?;for i in 0 1 2;do ((i==2&&j==1))&&break;((! j))||((i))||B2&&A1 18 $((79+i-(i+53)*j)) 107+8*j 94 74||continue;B7 11;B4 0 0 11;C3 $((23+i*(1+i+2*j)));D4 $((24+i*(1+i+2*j))) 18-4*j 82+i-16*j $((112+((3-i)*i-40*j)/2));done;D4 60 4 21 24;D4 42 14 1 62;D4 43 37 2 90 48;D4 41 10 42;D2 48 36 47 25;A1 4 3 60&&{ B3 9;A2 14 61;B4 0 10 21;B4 9 0;A2 14 62;B4 0 0 21;B6 0 10 4;C3 5;};D4 9 41 69 100;D2 72 21 68 35;D2 49 21 48 49;B4 4 22 57 102;A1 21 46 56 74;B7 22;B4 0 0 58;C3 47;D4 54 5 7 75 76 69;D4 52 5 8 75 76 69;D4 57 4 64 76 91;D2 0 4 4 84;D2 1 4 51 84;D4 21 22 9 37;D0 0 N1+17 108;D4 76 24 38;A1 23 18 28 89;B4 0 16 22 102;A1 16 25 33;B7 16;B4 0 0 34;D1 31 47;D4 64 4 71 41;D4 65 5 87 116 74;C4;B4 4 12 26 89 23 102;for i in {0..3};do A1 0 N1+10+i 72 74;B7 12;B4 0 0 52;C3 N3+5+i;((i))||C4;done;A1 24 22 29;B7 12;B3 14;A2 39 57 30;B6 14 0 4;C3 67;A1 24 75 74;B4 1 1 122||B7 12;B4 0 0 123;B3 23;A2 39 57 30;B6 23 0 4;C3 68;B4 4 13 27 89 65;A1 24 23;B7 13;C3 73;B4 4 0 87;A2 14 61 89 20;B4 0 17;A1 26 50 64;B7 17;C3 6;A1 4 88;D5 77 44 89;D4 7 11 6;D0 0 N1+18 109;A3;C2 39;C4;} 4>&2 2>/dev/null;);C5
Copy the selected text to the Clipboard by pressing the key combination command-C.
8. Launch the built-in Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad and start typing the name.
Click anywhere in the Terminal window and paste by pressing command-V. The text you pasted should vanish immediately. If it doesn't, press the return key.
9. If you see an error message in the Terminal window such as "Syntax error" or "Event not found," enter
exec bash
and press return. Then paste the script again.
10. If you're logged in as an administrator, you'll be prompted for your login password. Nothing will be displayed when you type it. You will not see the usual dots in place of typed characters. Make sure caps lock is off. Type carefully and then press return. You may get a one-time warning to be careful. If you make three failed attempts to enter the password, the test will run anyway, but it will produce less information. If you don't know the password, or if you prefer not to enter it, just press return three times at the password prompt. Again, the script will still run.
If you're not logged in as an administrator, you won't be prompted for a password. The test will still run. It just won't do anything that requires administrator privileges.
11. The test may take a few minutes to run, depending on how many files you have and the speed of the computer. A computer that's abnormally slow may take longer to run the test. While it's running, a series of lines will appear in the Terminal window like this:
[Process started]
        Part 1 of 8 done at … sec
        Part 8 of 8 done at … sec
        The test results are on the Clipboard.
        Please close this window.
[Process completed]
The intervals between parts won't be exactly equal, but they give a rough indication of progress. The total number of parts may be different from what's shown here.
Wait for the final message "Process completed" to appear. If you don't see it within about ten minutes, the test probably won't complete in a reasonable time. In that case, press the key combination control-C or command-period to stop it and go to the next step. You'll have incomplete results, but still something.
12. When the test is complete, or if you stopped it because it was taking too long, quit Terminal. The results will have been copied to the Clipboard automatically. They are not shown in the Terminal window. Please don't copy anything from there. All you have to do is start a reply to this comment and then paste by pressing command-V again.
At the top of the results, there will be a line that begins with the words "Start time." If you don't see that, but instead see a mass of gibberish, you didn't wait for the "Process completed" message to appear in the Terminal window. Please wait for it and try again.
If any private information, such as your name or email address, appears in the results, anonymize it before posting. Usually that won't be necessary.
13. When you post the results, you might see an error message on the web page: "You have included content in your post that is not permitted," or "You are not authorized to post." That's a bug in the forum software. Please post the test results on Pastebin, then post a link here to the page you created.
14. This is a public forum, and others may give you advice based on the results of the test. They speak for themselves, not for me. The test itself is harmless, but whatever else you're told to do may not be. For others who choose to run it, I don't recommend that you post the test results on this website unless I asked you to.
Copyright © 2014, 2015 by Linc Davis. As the sole author of this work, I reserve all rights to it except as provided in the Use Agreement for the Apple Support Communities website ("ASC"). Readers of ASC may copy it for their own personal use. Neither the whole nor any part may be redistributed.

After installing Yosemite on my MacBook Retina, (including the 10.10.1 update), my wifi connection has basically disappeared. When it does work, it is ridiculously slow. Any tips?

After installing Yosemite on my MacBook Retina, (including the 10.10.1 update), my wifi connection has basically disappeared. When it does work, it is ridiculously slow. Any tips?

Wi-FI connection drops
Wi-Fi Problems in OS X Yosemite
Wi-Fi Problems in OS X Yosemite (2)
Wireless Diagnostics
Also try turning off Bluetooth.
Troubleshooting Wi-Fi issues in OS X
Wireless Connection Problems - Fix
Wireless Connection Problems - Fix (2)
Wireless Connection Problems - Fix (3)
Wireless Connection Problems - Fix (4)

Very slow mac after installing yosemite

I have already tried all the online tips (like turning off transparency etc) but nothing works. I have also run Etrecheck and will include the report:
Problem description:
Mac very slow after installing yosemite
EtreCheck version: 2.1.8 (121)
Report generated 25 Mar 2015 16:49:59 CET
Download EtreCheck from http://etresoft.com/etrecheck
Click the [Click for support] links for help with non-Apple products.
Click the [Click for details] links for more information about that line.
Click the [Adware! - Remove] links for help removing adware.
Hardware Information: ℹ️
    iMac (21.5-inch, Mid 2011) (Technical Specifications)
    iMac - model: iMac12,1
    1 2.7 GHz Intel Core i5 CPU: 4-core
    4 GB RAM Upgradeable
        BANK 0/DIMM0
            2 GB DDR3 1333 MHz ok
        BANK 1/DIMM0
            2 GB DDR3 1333 MHz ok
        BANK 0/DIMM1
            Empty
        BANK 1/DIMM1
            Empty
    Bluetooth: Old - Handoff/Airdrop2 not supported
    Wireless: en1: 802.11 a/b/g/n
Video Information: ℹ️
    AMD Radeon HD 6770M - VRAM: 512 MB
        iMac 1920 x 1080
System Software: ℹ️
    OS X 10.10.2 (14C109) - Time since boot: 1:0:10
Disk Information: ℹ️
    WDC WD1001FALS-403AA0 disk0 : (1 TB)
        EFI (disk0s1) <not mounted> : 210 MB
        Macintosh HD (disk0s2) / : 999.35 GB (414.76 GB free)
        Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
    OPTIARC DVD RW AD-5690H
USB Information: ℹ️
    Apple Inc. FaceTime HD Camera (Built-in)
    Apple Inc. BRCM2046 Hub
        Apple Inc. Bluetooth USB Host Controller
    Apple Computer, Inc. IR Receiver
    Apple Internal Memory Card Reader
Thunderbolt Information: ℹ️
    Apple Inc. thunderbolt_bus
Configuration files: ℹ️
    /etc/hosts - Count: 5
Gatekeeper: ℹ️
    Mac App Store and identified developers
Adware: ℹ️
    Geneio [Adware! - Remove]
Kernel Extensions: ℹ️
        /Library/Application Support/Avast/components/fileshield/unsigned
    [loaded]    com.avast.AvastFileShield (2.1.0 - SDK 10.10) [Click for support]
        /Library/Application Support/Avast/components/proxy/unsigned
    [loaded]    com.avast.PacketForwarder (2.0 - SDK 10.10) [Click for support]
        /System/Library/Extensions
    [loaded]    com.Cycling74.driver.Soundflower (1.6.6 - SDK 10.6) [Click for support]
Launch Agents: ℹ️
    [not loaded]    com.adobe.AAM.Updater-1.0.plist [Click for support]
    [running]    com.avast.update-agent.plist [Click for support]
    [loaded]    com.avast.userinit.plist [Click for support]
    [loaded]    com.hp.help.tocgenerator.plist [Click for support]
    [loaded]    com.oracle.java.Java-Updater.plist [Click for support]
    [not loaded]    com.teamviewer.teamviewer.plist [Click for support]
    [not loaded]    com.teamviewer.teamviewer_desktop.plist [Click for support]
Launch Daemons: ℹ️
    [loaded]    com.adobe.fpsaud.plist [Click for support]
    [loaded]    com.adobe.SwitchBoard.plist [Click for support]
    [loaded]    com.avast.init.plist [Click for support]
    [loaded]    com.avast.uninstall.plist [Click for support]
    [loaded]    com.avast.update.plist [Click for support]
    [loaded]    com.microsoft.office.licensing.helper.plist [Click for support]
    [loaded]    com.oracle.java.Helper-Tool.plist [Click for support]
    [loaded]    com.oracle.java.JavaUpdateHelper.plist [Click for support]
    [loaded]    com.teamviewer.Helper.plist [Click for support]
    [not loaded]    com.teamviewer.teamviewer_service.plist [Click for support]
User Launch Agents: ℹ️
    [loaded]    com.adobe.AAM.Updater-1.0.plist [Click for support]
    [loaded]    com.avast.home.userinit.plist [Click for support]
    [loaded]    com.divx.agent.postinstall.plist [Click for support]
    [loaded]    com.google.keystone.agent.plist [Click for support]
    [running]    com.spotify.webhelper.plist [Click for support]
User Login Items: ℹ️
    Mail    Application (/Applications/Mail.app)
    Google Chrome    Application (/Applications/Google Chrome.app)
Internet Plug-ins: ℹ️
    FlashPlayer-10.6: Version: 16.0.0.305 - SDK 10.6 [Click for support]
    OVSHelper: Version: 1.1 [Click for support]
    Flash Player: Version: 16.0.0.305 - SDK 10.6 Outdated! Update
    EPPEX Plugin: Version: 3.0.5.0 [Click for support]
    DivXBrowserPlugin: Version: 2.2 [Click for support]
    Default Browser: Version: 600 - SDK 10.10
    QuickTime Plugin: Version: 7.7.3
    SharePointBrowserPlugin: Version: 14.1.0 [Click for support]
    Silverlight: Version: 5.1.30514.0 - SDK 10.6 [Click for support]
    JavaAppletPlugin: Version: Java 7 Update 71 Check version
User internet Plug-ins: ℹ️
    Google Earth Web Plug-in: Version: 7.1 [Click for support]
Safari Extensions: ℹ️
    Open in Internet Explorer
Audio Plug-ins: ℹ️
    WireTapAnywhere: Version: 2.0.0 [Click for support]
3rd Party Preference Panes: ℹ️
    DivX [Click for support]
    Flash Player [Click for support]
    Java [Click for support]
Time Machine: ℹ️
    Mobile backups: OFF
    Auto backup: NO - Auto backup turned off
    Volumes being backed up:
        Macintosh HD: Disk size: 999.35 GB Disk used: 584.59 GB
    Destinations:
        HEIDI [Local]
        Total size: 0 B
        Total number of backups: 0
        Oldest backup: -
        Last backup: -
        Size of backup disk: Too small
            Backup size 0 B < (Disk used 584.59 GB X 3)
Top Processes by CPU: ℹ️
         2%    WindowServer
         1%    CalendarAgent
         1%    Mail
         0%    Google Chrome
         0%    fontd
Top Processes by Memory: ℹ️
    198 MB    Google Chrome
    114 MB    Google Chrome Helper
    94 MB    Mail
    86 MB    Finder
    82 MB    mds_stores
Virtual Memory Information: ℹ️
    61 MB    Free RAM
    1.44 GB    Active RAM
    1.40 GB    Inactive RAM
    906 MB    Wired RAM
    4.92 GB    Page-ins
    64 MB    Page-outs
Diagnostics Information: ℹ️
    Mar 25, 2015, 03:46:40 PM    Self test - passed
    Mar 25, 2015, 11:26:31 AM    /Library/Logs/DiagnosticReports/Preview_2015-03-25-112631_[redacted].hang
    Mar 25, 2015, 11:26:30 AM    /Library/Logs/DiagnosticReports/Preview_2015-03-25-112630_[redacted].hang
    Mar 25, 2015, 11:26:21 AM    /Library/Logs/DiagnosticReports/Preview_2015-03-25-112621_[redacted].hang
    Mar 25, 2015, 10:54:50 AM    /Library/Logs/DiagnosticReports/com.avast.daemon_2015-03-25-105450_[redacted].c pu_resource.diag [Click for details]
    Mar 23, 2015, 12:30:12 PM    /Users/[redacted]/Library/Logs/DiagnosticReports/Adobe Photoshop CS5.1_2015-03-23-123012_[redacted].crash

I am having problems with slowness, too - ever since installing the latest Yosemite update I downloaded a few days ago. EVERYTHING - Safari, QuickTime, MS Word for Apple, the DVD Player, everything - runs slowly and I get the "rainbow pinwheel of frustration". It's taken me three minutes to type these few sentences. It's really starting to frustrate me. Here is my EtreCheck report:
Problem description:
Since I installed the latest Yosemite update (10.10.2), EVERYTHING runs slowly. I get the rainbow pinwheel whenever I click on anything on Safari, and have trouble typing via Safari; videos stop and start on QuickTime; MS Word for Apple runs slowly - EVERYTHING seems to be slowed down. It took four minutes to get the above sentences typed. Please help me escape the “rainbow pinwheel of failure”!
EtreCheck version: 2.1.8 (121)
Report generated March 26, 2015 at 12:56:40 PM EDT
Download EtreCheck from http://etresoft.com/etrecheck
Click the [Click for support] links for help with non-Apple products.
Click the [Click for details] links for more information about that line.
Hardware Information: ℹ️
    MacBook Pro (15-inch, Mid 2010) (Technical Specifications)
    MacBook Pro - model: MacBookPro6,2
    1 2.66 GHz Intel Core i7 CPU: 2-core
    4 GB RAM Upgradeable
        BANK 0/DIMM0
            2 GB DDR3 1067 MHz ok
        BANK 1/DIMM0
            2 GB DDR3 1067 MHz ok
    Bluetooth: Old - Handoff/Airdrop2 not supported
    Wireless: en1: 802.11 a/b/g/n
    Battery Health: Normal - Cycle count 16
Video Information: ℹ️
    Intel HD Graphics - VRAM: 288 MB
        Color LCD 1680 x 1050
    NVIDIA GeForce GT 330M - VRAM: 512 MB
System Software: ℹ️
    OS X 10.10.2 (14C1514) - Time since boot: 4 days 13:7:46
Disk Information: ℹ️
    ST9500325ASG disk0 : (500.11 GB)
        EFI (disk0s1) <not mounted> : 210 MB
        Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
        Macintosh HD (disk1) / : 498.88 GB (67.68 GB free)
            Encrypted AES-XTS Unlocked Converting
            Core Storage: disk0s2 499.25 GB Online
    MATSHITADVD-R   UJ-898 disk3 : (4.13 GB)
USB Information: ℹ️
    Apple Inc. BRCM2070 Hub
        Apple Inc. Bluetooth USB Host Controller
    Apple Internal Memory Card Reader
    Apple Inc. Apple Internal Keyboard / Trackpad
    Seagate FreeAgent GoFlex 500.11 GB
        EFI (disk2s1) <not mounted> : 210 MB
        Time Machine Backups (disk2s2) /Volumes/Time Machine Backups : 499.76 GB (9.35 GB free)
    Apple Inc. Built-in iSight
    Apple Computer, Inc. IR Receiver
Gatekeeper: ℹ️
    Mac App Store and identified developers
Kernel Extensions: ℹ️
        /System/Library/Extensions
    [not loaded]    com.devguru.driver.PTUMWDrv (9.6.8) [Click for support]
    [not loaded]    com.seagate.driver.PowSecDriverCore (5.0.1) [Click for support]
        /System/Library/Extensions/PTUMWDrv.kext/Contents/PlugIns
    [not loaded]    com.devguru.driver.PTUMWCDFree (9.6.8) [Click for support]
    [not loaded]    com.devguru.driver.PTUMWCSP (9.6.8) [Click for support]
    [not loaded]    com.devguru.driver.PTUMWDIAG (9.6.8) [Click for support]
    [not loaded]    com.devguru.driver.PTUMWMdmControl (9.6.8) [Click for support]
    [not loaded]    com.devguru.driver.PTUMWMdmData (9.6.8) [Click for support]
    [not loaded]    com.devguru.driver.PTUMWNMEA (9.6.8) [Click for support]
        /System/Library/Extensions/Seagate Storage Driver.kext/Contents/PlugIns
    [not loaded]    com.seagate.driver.PowSecLeafDriver_10_4 (5.0.1) [Click for support]
    [not loaded]    com.seagate.driver.PowSecLeafDriver_10_5 (5.0.1) [Click for support]
    [not loaded]    com.seagate.driver.SeagateDriveIcons (5.0.1) [Click for support]
Problem System Launch Agents: ℹ️
    [killed]    com.apple.CallHistoryPluginHelper.plist
    [killed]    com.apple.CallHistorySyncHelper.plist
    [killed]    com.apple.cmfsyncagent.plist
    [killed]    com.apple.coreservices.appleid.authentication.plist
    [killed]    com.apple.scopedbookmarkagent.xpc.plist
    [killed]    com.apple.telephonyutilities.callservicesd.plist
    6 processes killed due to memory pressure
Problem System Launch Daemons: ℹ️
    [killed]    com.apple.AssetCacheLocatorService.plist
    [killed]    com.apple.awdd.plist
    [killed]    com.apple.ctkd.plist
    [killed]    com.apple.icloud.findmydeviced.plist
    [killed]    com.apple.ifdreader.plist
    [killed]    com.apple.installd.plist
    [killed]    com.apple.nehelper.plist
    [killed]    com.apple.periodic-monthly.plist
    [killed]    com.apple.periodic-weekly.plist
    [killed]    com.apple.softwareupdate_download_service.plist
    [killed]    com.apple.tccd.system.plist
    [killed]    com.apple.wdhelper.plist
    12 processes killed due to memory pressure
Launch Agents: ℹ️
    [unknown]    com.oracle.java.Java-Updater.plist [Click for support]
    [running]    com.seagate.SeagateStorageGauge.plist [Click for support]
Launch Daemons: ℹ️
    [loaded]    com.adobe.fpsaud.plist [Click for support]
    [running]    com.memeo.Memeod.plist [Click for support]
    [loaded]    com.microsoft.office.licensing.helper.plist [Click for support]
    [unknown]    com.oracle.java.Helper-Tool.plist [Click for support]
User Launch Agents: ℹ️
    [loaded]    com.google.keystone.agent.plist [Click for support]
User Login Items: ℹ️
    iTunesHelper    UNKNOWN Hidden (missing value)
    CBCStatusMenu    Application (/Applications/Cricket Broadband Connect.app/Contents/Resources/CBCStatusMenu.app)
    EEventManager    Application Hidden (/Applications/Epson Software/Event Manager.app/Contents/Resources/Assistants/Event Manager/EEventManager.app)
    EEventManager    Application (/Applications/Epson Software/Event Manager.app/Contents/Resources/Assistants/Event Manager/EEventManager.app)
    ConnectService    Application (/Library/Application Support/ArcSoft/Connect Service/ConnectService.app)
    MemeoAgent    Application (/Library/Application Support/Memeo/Memeo Backup/Agents/MemeoAgent.app)
Internet Plug-ins: ℹ️
    Flip4Mac WMV Plugin: Version: 3.2.0.16   - SDK 10.8 [Click for support]
    FlashPlayer-10.6: Version: 17.0.0.134 - SDK 10.6 [Click for support]
    QuickTime Plugin: Version: 7.7.3
    Flash Player: Version: 17.0.0.134 - SDK 10.6 [Click for support]
    Default Browser: Version: 600 - SDK 10.10
    CitrixICAClientPlugIn: Version: 11.2.0 [Click for support]
    SharePointBrowserPlugin: Version: 14.4.7 - SDK 10.6 [Click for support]
    Unity Web Player: Version: UnityPlayer version 4.3.5f1 - SDK 10.6 [Click for support]
    Silverlight: Version: 5.1.10516.0 - SDK 10.6 [Click for support]
    iPhotoPhotocast: Version: 7.0 - SDK 10.8
Safari Extensions: ℹ️
    AddThis
    Greenhouse
3rd Party Preference Panes: ℹ️
    Citrix Online Plug-in [Click for support]
    Flash Player [Click for support]
    Flip4Mac WMV [Click for support]
Time Machine: ℹ️
    Skip System Files: NO
    Auto backup: YES
    Volumes being backed up:
        Macintosh HD: Disk size: 498.88 GB Disk used: 431.20 GB
    Destinations:
        Time Machine Backups [Local]
        Total size: 499.76 GB
        Total number of backups: 67
        Oldest backup: 2014-04-22 12:40:59 +0000
        Last backup: 2015-03-26 15:08:56 +0000
        Size of backup disk: Too small
            Backup size 499.76 GB < (Disk used 431.20 GB X 3)
Top Processes by CPU: ℹ️
         4%    WindowServer
         1%    com.apple.WebKit.Networking
         0%    ConnectService
         0%    systemstatsd
         0%    fontd
Top Processes by Memory: ℹ️
    142 MB    Safari
    90 MB    com.apple.WebKit.WebContent
    39 MB    com.apple.WebKit.Networking
    34 MB    com.apple.WebKit.Plugin.64
    34 MB    WindowServer
Virtual Memory Information: ℹ️
    43 MB    Free RAM
    946 MB    Active RAM
    911 MB    Inactive RAM
    967 MB    Wired RAM
    21.68 GB    Page-ins
    870 MB    Page-outs
Diagnostics Information: ℹ️
    Mar 25, 2015, 04:31:02 PM    /Users/[redacted]/Library/Logs/DiagnosticReports/com.apple.WebKit.Plugin.64_201 5-03-25-163102_[redacted].crash
    Mar 25, 2015, 02:16:40 PM    /Users/[redacted]/Library/Logs/DiagnosticReports/com.apple.WebKit.WebContent_20 15-03-25-141640_[redacted].crash
    Mar 25, 2015, 10:04:38 AM    /Users/[redacted]/Library/Logs/DiagnosticReports/Aperture_2015-03-25-100438_[re dacted].crash

2009 iMac is running slowly after installing Yosemite

Dear Community -
I recently "upgraded" my OS to Yosemite ... unfortunately I had not gone to Mavericks in the meantime, so there's no way for me to re-install it.
Any suggestions for how to rescue my iMac from being a brick?
EtreCheck report is below ...
Thanks!
Scott
Problem description:
Mac is slow after installing Yosemite
EtreCheck version: 2.1.5 (108)
Report generated December 26, 2014 at 9:44:37 AM PST
Click the [Support] links for help with non-Apple products.
Click the [Details] links for more information about that line.
Click the [Adware] links for help removing adware.
Hardware Information: ℹ️
iMac (27-inch, Late 2009) (Verified)
iMac - model: iMac10,1
1 3.06 GHz Intel Core 2 Duo CPU: 2-core
4 GB RAM Upgradeable
BANK 0/DIMM0
empty empty empty empty
BANK 1/DIMM0
empty empty empty empty
BANK 0/DIMM1
2 GB DDR3 1067 MHz ok
BANK 1/DIMM1
2 GB DDR3 1067 MHz ok
Bluetooth: Old - Handoff/Airdrop2 not supported
Wireless: en1: 802.11 a/b/g/n
Video Information: ℹ️
ATI Radeon HD 4670 - VRAM: 256 MB
iMac 2560 x 1440
System Software: ℹ️
OS X 10.10 (14A389) - Uptime: 2:2:57
Disk Information: ℹ️
Hitachi HDE721010SLA330 disk0 : (1 TB)
EFI (disk0s1) <not mounted> : 210 MB
Macintosh HD (disk0s2) / [Startup]: 999.35 GB (3.98 GB free) (Low!)
Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
OPTIARC DVD RW AD-5680H disk3 : (4.71 GB)
USB Information: ℹ️
Apple Inc. iPhone
Apple Inc. Built-in iSight
Apple Internal Memory Card Reader
Iomega External HD 1.5 TB
EFI (disk1s1) <not mounted> : 210 MB
Iomega HDD (disk1s2) /Volumes/Iomega HDD : 1.50 TB (2.05 GB free)
Maxtor OneTouch 122.94 GB
MAXTOR (disk2s1) /Volumes/MAXTOR : 120.03 GB (45.38 GB free)
Fitbit Inc. Fitbit Base Station
Apple Computer, Inc. IR Receiver
Apple Inc. BRCM2046 Hub
Apple Inc. Bluetooth USB Host Controller
Gatekeeper: ℹ️
Mac App Store and identified developers
Kernel Extensions: ℹ️
/System/Library/Extensions
[not loaded] com.Belcarra.iokit.USBLAN_netpart (2.0.2) [Support]
[not loaded] com.Belcarra.iokit.USBLAN_usbpart (2.0.2) [Support]
[not loaded] com.RemoteControl.USBLAN.usbpart (2.0.6) [Support]
[not loaded] com.leapfrog.driver.LfConnectDriver (1.0.1) [Support]
[not loaded] com.newwellnesssolutions.iokit.DLconnect (84) [Support]
[not loaded] com.silabs.driver.SiLabsUSBDriver (1.1.2 - SDK 10.4) [Support]
/System/Library/Extensions/Belcarra.USBLAN_netpart.kext/Contents/PlugIns
[not loaded] com.belcarra.iokit.netpart.panther (1.6.1) [Support]
/System/Library/Extensions/Belcarra.USBLAN_usbpart.kext/Contents/PlugIns
[not loaded] com.belcarra.iokit.usbpart.panther (1.6.1) [Support]
/System/Library/Extensions/RemoteControl.USBLAN_usbpart.kext/Contents/PlugIns
[not loaded] com.RemoteControl.USBLAN.panther (1.6.1) [Support]
Launch Agents: ℹ️
[loaded] com.google.keystone.agent.plist [Support]
[running] com.newwellnesssolutions.DLconnectMonitor.plist [Support]
Launch Daemons: ℹ️
[loaded] com.adobe.fpsaud.plist [Support]
[running] com.fitbit.fitbitd.plist [Support]
[running] com.fitbit.galileod.plist [Support]
[loaded] com.google.keystone.daemon.plist [Support]
[loaded] com.leapfrog.connect.shell.plist [Support]
User Launch Agents: ℹ️
[loaded] com.adobe.ARM.[...].plist [Support]
[running] com.akamai.single-user-client.plist [Support]
[invalid?] com.nds.pcshow.plist [Support]
[invalid?] com.nds.pcshow.uninstall.plist [Support]
User Login Items: ℹ️
Garmin Express Service Application (/Applications/Garmin Express.app/Contents/Library/LoginItems/Garmin Express Service.app)
Google Chrome Application (/Applications/Google Chrome.app)
System Preferences Application (/Applications/System Preferences.app)
DVDAuthorizeHelper Application (/Users/[redacted]/Library/Application Support/Helper/DVDAuthorizeHelper.app)
AdobeResourceSynchronizer ApplicationHidden (/Applications/Adobe Reader.app/Contents/Support/AdobeResourceSynchronizer.app)
EvernoteHelper Application (/Applications/Evernote.app/Contents/Library/LoginItems/EvernoteHelper.app)
HP Scheduler Application (/Library/Application Support/Hewlett-Packard/Software Update/HP Scheduler.app)
Internet Plug-ins: ℹ️
nplastpass: Version: 2.5.5 [Support]
o1dbrowserplugin: Version: 5.38.6.0 - SDK 10.8 [Support]
Google Earth Web Plug-in: Version: 7.1 [Support]
Default Browser: Version: 600 - SDK 10.10
CouponPrinter-FireFox: Version: Version 1.1.5
OfficeLiveBrowserPlugin: Version: 12.3.6 [Support]
AdobePDFViewerNPAPI: Version: 11.0.09 - SDK 10.6 [Support]
FlashPlayer-10.6: Version: 15.0.0.246 - SDK 10.6 [Support]
Silverlight: Version: 5.1.20125.0 - SDK 10.6 [Support]
Flash Player: Version: 15.0.0.246 - SDK 10.6 Mismatch! Adobe recommends 16.0.0.235
iPhotoPhotocast: Version: 7.0
googletalkbrowserplugin: Version: 5.38.6.0 - SDK 10.8 [Support]
QuickTime Plugin: Version: 7.7.3
AdobePDFViewer: Version: 11.0.09 - SDK 10.6 [Support]
GarminGpsControl: Version: 4.2.0.0 - SDK 10.8 [Support]
User internet Plug-ins: ℹ️
BrowserPlus_2.8.1: Version: 2.8.1 [Support]
WebEx: Version: 1.0 [Support]
Safari Extensions: ℹ️
Ultimate [Installed]
Searchme [Installed] Adware! [Remove]
SlickSavings [Installed]
LastPass [Installed]
Ebay Shopping Assistant [Installed] Adware! [Remove]
3rd Party Preference Panes: ℹ️
Akamai NetSession Preferences [Support]
BrowserPlus [Support]
Flash Player [Support]
GoPro [Support]
Growl [Support]
Time Machine: ℹ️
Time Machine not configured!
Top Processes by CPU: ℹ️
      11% mds
      2% WindowServer
      2% iPhoto
      1% Google Chrome
      1% coreaudiod
Top Processes by Memory: ℹ️
412 MB iPhoto
193 MB Google Chrome
86 MB loginwindow
77 MB WindowServer
73 MB mds_stores
Virtual Memory Information: ℹ️
666 MB Free RAM
1.90 GB Active RAM
757 MB Inactive RAM
606 MB Wired RAM
7.25 GB Page-ins
38 MB Page-outs
Diagnostics Information: ℹ️
Dec 26, 2014, 07:42:21 AM Self test - passed

[not loaded] com.leapfrog.driver.LfConnectDriver (1.0.1) [Support]
This has caused problems for some. Try un-installing it following the developer's un-install instructions.
Activity Monitor - Mavericks also Yosemite
Activity Monitor in Mavericks has significant changes
Performance Guide
Why is my computer slow
Why your Mac runs slower than it should
Slow Mac After Mavericks
Things you can do to resolve slowdowns see post by Kappy

Reboot Stuck After Installing Yosemite

After installing Yosemite I got a notification that the system would be slow while it optimizes the system. Well, after 3 hours of using it in slow motion, I rebooted. During the shutdown phase I got a blank screen with a spinning wagon wheel. It's been like this now for about an hour.
Any suggestions?

Usually, if your drive does not appear at all in Disk Utility, then it has died. What is the exact model Mac that you have? If it is pre-2011 then it cannot do full Internet Recovery. I don't know what the error message means. Are you using a default router setup or are you using your own configuration with different DNS settings? I don't know what that error means, specifically, but usually those errors indicate a connection problem. If possible try using Ethernet rather than Wi-Fi.

Please help my MBP is so slow after installing yosemite

After installing Yosemite my computer lags, crashes, and is so slow. Please help!!
Problem description:
My late 2011 17 inch MBP has slowed down so much since installing Yosemite. My mail and other apps just crash or i get the rainbow ball of death.
EtreCheck version: 2.1.8 (121)
Report generated March 5, 2015 at 1:39:55 AM EST
Download EtreCheck from http://etresoft.com/etrecheck
Click the [Click for support] links for help with non-Apple products.
Click the [Click for details] links for more information about that line.
Hardware Information: ℹ️
    MacBook Pro (17-inch, Late 2011) (Technical Specifications)
    MacBook Pro - model: MacBookPro8,3
    1 2.5 GHz Intel Core i7 CPU: 4-core
    4 GB RAM Upgradeable
        BANK 0/DIMM0
            2 GB DDR3 1333 MHz ok
        BANK 1/DIMM0
            2 GB DDR3 1333 MHz ok
    Bluetooth: Old - Handoff/Airdrop2 not supported
    Wireless: en1: 802.11 a/b/g/n
    Battery Health: Normal - Cycle count 140
Video Information: ℹ️
    Intel HD Graphics 3000 - VRAM: 384 MB
        Color LCD 1920 x 1200
    AMD Radeon HD 6770M - VRAM: 1024 MB
System Software: ℹ️
    OS X 10.10.2 (14C109) - Time since boot: one day 10:23:42
Disk Information: ℹ️
    APPLE HDD HTS727575A9E362 disk0 : (750.16 GB)
        EFI (disk0s1) <not mounted> : 210 MB
        Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
        Macintosh HD (disk1) / : 748.93 GB (584.36 GB free)
            Core Storage: disk0s2 749.30 GB Online
    MATSHITADVD-R   UJ-8A8
USB Information: ℹ️
    Apple Inc. FaceTime HD Camera (Built-in)
    Apple Inc. BRCM2070 Hub
        Apple Inc. Bluetooth USB Host Controller
    Apple Inc. Apple Internal Keyboard / Trackpad
    Logitech USB Receiver
    Apple Computer, Inc. IR Receiver
Thunderbolt Information: ℹ️
    Apple Inc. thunderbolt_bus
Gatekeeper: ℹ️
    Mac App Store and identified developers
Kernel Extensions: ℹ️
        /System/Library/Extensions
    [not loaded]    com.devguru.driver.SamsungComposite (1.4.28 - SDK 10.6) [Click for support]
        /System/Library/Extensions/ssuddrv.kext/Contents/PlugIns
    [not loaded]    com.devguru.driver.SamsungACMControl (1.4.28 - SDK 10.6) [Click for support]
    [not loaded]    com.devguru.driver.SamsungACMData (1.4.28 - SDK 10.6) [Click for support]
    [not loaded]    com.devguru.driver.SamsungMTP (1.4.28 - SDK 10.5) [Click for support]
    [not loaded]    com.devguru.driver.SamsungSerial (1.4.28 - SDK 10.6) [Click for support]
Problem System Launch Agents: ℹ️
    [killed]    com.apple.CallHistoryPluginHelper.plist
    [killed]    com.apple.icloud.fmfd.plist
    [killed]    com.apple.printtool.agent.plist
    [killed]    com.apple.scopedbookmarkagent.xpc.plist
    [killed]    com.apple.spindump_agent.plist
    5 processes killed due to memory pressure
Problem System Launch Daemons: ℹ️
    [killed]    com.apple.ctkd.plist
    [killed]    com.apple.nehelper.plist
    [killed]    com.apple.periodic-weekly.plist
    [killed]    com.apple.spindump.plist
    [killed]    com.apple.wdhelper.plist
    5 processes killed due to memory pressure
Launch Agents: ℹ️
    [not loaded]    com.adobe.AAM.Updater-1.0.plist [Click for support]
    [loaded]    com.adobe.CS5ServiceManager.plist [Click for support]
    [loaded]    com.coupons.coupond.plist [Click for support]
    [loaded]    com.google.keystone.agent.plist [Click for support]
    [running]    com.rosettastone.rosettastonedaemon.plist [Click for support]
Launch Daemons: ℹ️
    [loaded]    com.adobe.fpsaud.plist [Click for support]
    [loaded]    com.adobe.SwitchBoard.plist [Click for support]
    [loaded]    com.google.keystone.daemon.plist [Click for support]
User Launch Agents: ℹ️
    [loaded]    com.adobe.AAM.Updater-1.0.plist [Click for support]
    [loaded]    com.adobe.ARM.[...].plist [Click for support]
    [loaded]    com.adobe.ARM.[...].plist [Click for support]
User Login Items: ℹ️
    iTunesHelper    Application (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
    Google Chrome    Application Hidden (/Applications/Google Chrome.app)
    SpeechSynthesisServer    Application (/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks /SpeechSynthesis.framework/Versions/A/SpeechSynthesisServer.app)
    AT&T Locker Uploader    Application Hidden (/Applications/AT&T Locker Uploader.app)
    Google Drive    Application (/Applications/Google Drive.app)
    AdobeResourceSynchronizer    Application Hidden (/Applications/Adobe Reader.app/Contents/Support/AdobeResourceSynchronizer.app)
    KiesAgent    Application Hidden (/Applications/Kies.app/Contents/MacOS/KiesAgent.app)
    fuspredownloader    Application Hidden (/Users/[redacted]/Library/Application Support/.FUS/fuspredownloader.app)
Internet Plug-ins: ℹ️
    FlashPlayer-10.6: Version: 16.0.0.305 - SDK 10.6 [Click for support]
    Default Browser: Version: 600 - SDK 10.10
    AdobePDFViewerNPAPI: Version: 11.0.06 - SDK 10.6 [Click for support]
    CouponPrinter-FireFox_v2: Version: 5.0.3 - SDK 10.6 [Click for support]
    AdobePDFViewer: Version: 9.5.5 [Click for support]
    Flash Player: Version: 16.0.0.305 - SDK 10.6 [Click for support]
    QuickTime Plugin: Version: 7.7.3
    JavaAppletPlugin: Version: 15.0.0 - SDK 10.10 Check version
User internet Plug-ins: ℹ️
    Google Earth Web Plug-in: Version: 7.1 [Click for support]
Safari Extensions: ℹ️
    Evernote Web Clipper
3rd Party Preference Panes: ℹ️
    Flash Player [Click for support]
    Growl [Click for support]
Time Machine: ℹ️
    Skip System Files: NO
    Auto backup: YES
    Volumes being backed up:
        Macintosh HD: Disk size: 748.93 GB Disk used: 164.57 GB
    Destinations:
        My Passport [Local]
        Total size: 999.83 GB
        Total number of backups: 30
        Oldest backup: 2014-02-25 21:26:49 +0000
        Last backup: 2015-02-12 12:32:16 +0000
        Size of backup disk: Adequate
            Backup size 999.83 GB > (Disk used 164.57 GB X 3)
Top Processes by CPU: ℹ️
         6%    WindowServer
         2%    Google Chrome
         0%    AppleSpell
         0%    fontd
         0%    Google Drive
Top Processes by Memory: ℹ️
    365 MB    Google Chrome Helper
    189 MB    Google Chrome
    69 MB    mds_stores
    69 MB    Finder
    56 MB    WindowServer
Virtual Memory Information: ℹ️
    33 MB    Free RAM
    1.36 GB    Active RAM
    1.34 GB    Inactive RAM
    1.19 GB    Wired RAM
    13.90 GB    Page-ins
    266 MB    Page-outs
Diagnostics Information: ℹ️
    Mar 5, 2015, 01:08:29 AM    /Users/[redacted]/Library/Logs/DiagnosticReports/Mail_2015-03-05-010829_[redact ed].crash
    Mar 3, 2015, 03:14:22 PM    Self test - passed
    Mar 2, 2015, 03:55:45 PM    /Users/[redacted]/Library/Logs/DiagnosticReports/coupond_2015-03-02-155545_[red acted].crash

Activity Monitor - Mavericks also Yosemite
Activity Monitor in Mavericks has significant changes
Performance Guide
Why is my computer slow
Why your Mac runs slower than it should
Slow Mac After Mavericks
Things you can do to resolve slowdowns see post by Kappy

My iMac is very slow to boot after installing Yosemite

Hi
My iMac is very slow after installing Yosemite. Can any one help? Here is my Etrecheck below
EtreCheck version: 2.1.5 (108)
Report generated 20 December 2014 9:38:19 pm AWST
Click the [Support] links for help with non-Apple products.
Click the [Details] links for more information about that line.
Click the [Adware] links for help removing adware.
Hardware Information: ℹ️
iMac (21.5-inch, Mid 2011) (Verified)
iMac - model: iMac12,1
1 2.8 GHz Intel Core i7 CPU: 4-core
4 GB RAM Upgradeable
BANK 0/DIMM0
2 GB DDR3 1333 MHz ok
BANK 1/DIMM0
2 GB DDR3 1333 MHz ok
BANK 0/DIMM1
empty empty empty empty
BANK 1/DIMM1
empty empty empty empty
Bluetooth: Old - Handoff/Airdrop2 not supported
Wireless: en1: 802.11 a/b/g/n
Video Information: ℹ️
AMD Radeon HD 6770M - VRAM: 512 MB
iMac 1920 x 1080
System Software: ℹ️
OS X 10.10.1 (14B25) - Uptime: 0:5:38
Disk Information: ℹ️
WDC WD1001FALS-403AA0 disk0 : (1 TB)
EFI (disk0s1) <not mounted> : 210 MB
Macintosh HD (disk0s2) / : 999.35 GB (680.79 GB free)
Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
HL-DT-STDVDRW GA32N
USB Information: ℹ️
Apple Inc. FaceTime HD Camera (Built-in)
HP Photosmart 5520 series
Apple Inc. BRCM2046 Hub
Apple Inc. Bluetooth USB Host Controller
Apple Computer, Inc. IR Receiver
Apple Internal Memory Card Reader
Thunderbolt Information: ℹ️
Apple Inc. thunderbolt_bus
Gatekeeper: ℹ️
Mac App Store and identified developers
Kernel Extensions: ℹ️
/Applications/Splashtop Streamer.app
[not loaded] com.splashtop.driver.SRXDisplayCard (1.6 - SDK 10.7) [Support]
[not loaded] com.splashtop.driver.SRXFrameBufferConnector (1.6 - SDK 10.7) [Support]
/Library/Application Support/Avast/components/fileshield/unsigned
[loaded] com.avast.AvastFileShield (2.1.0 - SDK 10.9) [Support]
/Library/Application Support/Avast/components/proxy/unsigned
[loaded] com.avast.PacketForwarder (2.0 - SDK 10.9) [Support]
/System/Library/Extensions
[loaded] com.Cycling74.driver.Soundflower (1.6.6 - SDK 10.6) [Support]
Launch Agents: ℹ️
[loaded] com.avast.userinit.plist [Support]
[not loaded] com.splashtop.streamer-for-root.plist [Support]
[running] com.splashtop.streamer-for-user.plist [Support]
[running] com.teamviewer.teamviewer.plist [Support]
[running] com.teamviewer.teamviewer_desktop.plist [Support]
Launch Daemons: ℹ️
[loaded] com.adobe.fpsaud.plist [Support]
[loaded] com.avast.init.plist [Support]
[loaded] com.avast.uninstall.plist [Support]
[loaded] com.avast.update.plist [Support]
[not loaded] com.macpaw.CleanMyMac2.Agent.plist [Support]
[loaded] com.microsoft.office.licensing.helper.plist [Support]
[running] com.splashtop.streamer-daemon.plist [Support]
[loaded] com.splashtop.streamer-srioframebuffer.plist [Support]
[loaded] com.teamviewer.Helper.plist [Support]
[running] com.teamviewer.teamviewer_service.plist [Support]
User Launch Agents: ℹ️
[loaded] com.adobe.ARM.[...].plist [Support]
[invalid?] com.avast.home.userinit.plist [Support]
[not loaded] com.google.keystone.agent.plist [Support]
[loaded] com.macpaw.CleanMyMac2Helper.scheduledScan.plist [Support]
[loaded] com.macpaw.CleanMyMac2Helper.trashWatcher.plist [Support]
[running] com.spotify.webhelper.plist [Support]
User Login Items: ℹ️
AdobeResourceSynchronizer ApplicationHidden (/Applications/Adobe Reader.app/Contents/Support/AdobeResourceSynchronizer.app)
Dropbox Application (/Applications/Dropbox.app)
VLCStreamer Application (/Applications/VLCStreamer.app)
Internet Plug-ins: ℹ️
Flip4Mac WMV Plugin: Version: 3.0.0.126   - SDK 10.8 [Support]
FlashPlayer-10.6: Version: 16.0.0.235 - SDK 10.6 [Support]
Default Browser: Version: 600 - SDK 10.10
AdobePDFViewerNPAPI: Version: 10.1.13 [Support]
AdobePDFViewer: Version: 10.1.13 [Support]
Flash Player: Version: 16.0.0.235 - SDK 10.6 [Support]
QuickTime Plugin: Version: 7.7.3
SharePointBrowserPlugin: Version: 14.3.9 - SDK 10.6 [Support]
Silverlight: Version: 5.1.10411.0 - SDK 10.6 [Support]
JavaAppletPlugin: Version: 15.0.0 - SDK 10.10 Check version
Safari Extensions: ℹ️
wrc [Installed]
3rd Party Preference Panes: ℹ️
Flash Player [Support]
Flip4Mac WMV [Support]
Time Machine: ℹ️
Skip System Files: NO
Mobile backups: OFF
Auto backup: YES
Volumes being backed up:
Macintosh HD: Disk size: 999.35 GB Disk used: 318.55 GB
Destinations:
Data [Network]
Total size: 3.00 TB
Total number of backups: 84
Oldest backup: 2013-09-21 09:42:27 +0000
Last backup: 2014-12-20 11:26:14 +0000
Size of backup disk: Excellent
Backup size 3.00 TB > (Disk size 999.35 GB X 3)
Top Processes by CPU: ℹ️
      3% com.apple.WebKit.WebContent
      1% WindowServer
      1% Safari
      1% TeamViewer_Service
      0% com.avast.daemon
Top Processes by Memory: ℹ️
219 MB com.apple.WebKit.WebContent
133 MB com.avast.daemon
90 MB ocspd
77 MB mds_stores
73 MB Dropbox
Virtual Memory Information: ℹ️
82 MB Free RAM
1.70 GB Active RAM
1.67 GB Inactive RAM
829 MB Wired RAM
2.20 GB Page-ins
111 KB Page-outs
Diagnostics Information: ℹ️
Dec 20, 2014, 09:35:40 PM /Library/Logs/DiagnosticReports/com.avast.daemon_2014-12-20-213540_[redacted].c pu_resource.diag [Details]
Dec 20, 2014, 09:33:21 PM Self test - passed
Dec 20, 2014, 09:11:53 PM /Users/[redacted]/Library/Logs/DiagnosticReports/Finder_2014-12-20-211153_[reda cted].crash

Uninstall Avast and CleanMyMac2.
Avast Un-install
You do not need to use cleaning programs. They can destroy your computer operation as they may already have done.
CleanMyMac - Uninstall
CleanMyMac2 Un-install
After un-installing, run this program to make sure you got all the pieces.
EasyFind – Spotlight Replacement
Activity Monitor - Mavericks also Yosemite
Activity Monitor in Mavericks has significant changes
Performance Guide
Why is my computer slow
Why your Mac runs slower than it should
Slow Mac After Mavericks
Things you can do to resolve slowdowns see post by Kappy

No internet connection after installing yosemite

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