My MacBook Air shut down suddenly and is making a loud ticking noise.

I was working on my laptop then suddenly the screen went black (no shutdown screen or noise appeared) and it has now begun to make a loud ticking noise similar to a clock. It won't come back on and none of the keys are illuminated as they were previously. Any suggestions?

I would strongly suspect a failed hard drive. Take it in to an Apple Centre for a free diagnostic.

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My MacBook pro shut down suddenly and it won't turn back on. I was reading a book online, and it is fully charged. What can I do? Thank you!!!

My MacBook pro shut down suddenly and it won't turn back on. I was reading a book online, and it is fully charged. What can I do? Thank you!!!

Try another power outlet.
http://support.apple.com/kb/TS1365
Go step by step.
Note: Steps 5 and 6

My Macbook pro shut down suddenly and then blocked after login

Hello everyone, after checking in Apple community questions, I didn't find similar problem.
I have a Macbook Pro early 2011 with Os X Yosemite, yesterday while I was working on it, it suddenly shut down without any warning. After trying to turn it on again, it allowed me to type my password and I noticed that the screen is not clear and little bit blue. After typing the password, it showed me that it's loading.after that the screen just become grey/[a bit blue] and it doesn't go further than that..
I tried to RESET the SMC and also starting in a safe mode... But my problem remains the same.
PS: I couldn't start with disk utility software, when I tried, it just blocked.
What can I do?
Thanks for any reply,
Amine

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:
PATH=/usr/bin:/bin:/usr/sbin:/sbin:/usr/libexec;clear;cd;p=(1309 ' 0.5 0.25 50 1000 15 5120 1000 25000 6 6 5 1 0 100 ' 51 25600 4 10 25 5120 102400 1000 25 1536 500 40 500 300 85 25 20480 262144 20 2000 524288 604800 5 1024 25 50 );k=({Soft,Hard}ware Memory Diagnostics Power FireWire Thunderbolt USB Bluetooth SerialATA Extensions Applications Frameworks PrefPane Fonts Displays PCI UniversalAccess InstallHistory ConfigurationProfile AirPort 'com\.apple\.' -\\t N\\/A 'AES|atr|udit|msa|dnse|ax|ensh|fami|FileS|fing|ft[pw]|gedC|kdu|etS|is\.|alk|ODSA|otp|htt|pace|pcas|ps-lp|rexe|rlo|rsh|smb|snm|teln|upd-[aw]|uuc|vix|webf' OSBundle{Require,AllowUserLoa}d 'Mb/s:Mb/s:ms/s:KiB/s:%:total:MB:total:lifetime:sampled:per sec' 'Net in:Net out:I/O wait time:I/O requests:CPU usage:Open files:Memory:Mach ports:Energy:Energy:File opens:Forks:Failed forks:System errors' 'tsA|[ST]M[HL]' PlistBuddy{,' 2>&1'}' -c Print' 'Info\.plist' CFBundleIdentifier );f=('\n%s'{': ','\n\n'}'%s\n' '\nRAM details\n%s\n' %s{' 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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",$2);print 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-d 2 -name '${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}/$UID} '-n1 --show-initial-usage --show-process-energy' -r ' -F "\$Message" -k Sender nsurlstoraged -k Time ge -1h -k Level Nle 4 -k Message Req "^(ER|IN)" ' '/A* -type d -name *.app -prune ! -user 0' -vv '-D1 -IPRWck -s5 sleep 1' );N1=${#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 );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 $N1 1;B1;C2 31;B1&&! B2&&C2 32;D2 22 15 63;D0 0 N1+2 3;D0 0 N1+15 17;D4 3 0 N1+3 4;D4 4 0 N1+4 5;D4 N3+4 0 N1+9 59;D0 0 N1+16 99;for i in 0 1 2;do D4 N3+i 0 N1+5+i 6;done;D4 N3+3 0 N1+8 71;D4 62 1 10 7;D4 10 1 11 8;B2&&D4 18 19 53 67;D2 11 2 12 9;D2 12 3 13 10;D2 13 32 70 101 25;D2 71 6 76 13;D2 45 20 52 66;A1 7 77 14;B3 28;A1 20 31 111;B6 0 28 5;B4 0 0 110;C2 66;B2&&D0 45 90 124;D4 70 8 15 38;D0 9 16 16 77 45;C4;B2&&D0 35 49 61 75 76 78 45;B2&&{ D0 28 17 45;C4;};B2&&{ A1 43 85 117;B3 29;B4 0 0 119 76 81 45;C0;B4 29 0 118 119 76 82 45;C0;    };D0 12 40 54 16 79 45;D0 12 39 54 16 80 45;D4 74 25 77 15&&{ B4 0 8 103;B4 8 0;A2 18 74;B6 8 0 3;C3 75;};B2&&D4 19 21 0;B2&&D4 40 10 42;D2 2 0 N1+19 46 84;D2 44 34 43 53;D2 59 22 20 32;D2 33 0 N1+14 51;for i in {0..2};do A1 29 35+i 104+i;B3 25+i;done;B6 25 27 5;B6 0 26 5;B4 0 0 110;C2 69;D2 34 21 28 35;D4 35 27 29 36;A1 40 59 120;B3 18;A1 33 60 121;B8 18;B4 0 19 83;A1 27 32 39&&{ B3 20;B4 19 0;A2 33 33 40;B3 21;B6 20 21 3;};C2 36;D4 50 38 5 68;B4 19 0;D5 37 33 34 42;B2&&D4 46 35 45 55;D4 38 0 N1+20 43;B2&&D4 58 4 65 76 91;D4 63 4 19 44 75 95 12;B1&&{ D4 53 5 55 75 69&&D4 51 6 58 31;D4 56 5 56 97 75 98&&D0 0 N1+7 99;D2 55 5 27 84;D4 61 5 54 75 70;D4 14 5 14 96;D4 15 5 72 96;D4 17 5 78 96;C4;};D4 16 5 73 96;A1 13 44 74 18;C4;B3 4;B4 4 0 85;A2 14 61 89;B4 0 5 19 102;A1 17 41 50;B7 5;C3 8;B4 4 0 88;A2 14 24 89;C4;B4 0 6 19 102;B4 4 0 86;A2 14 61 89;B4 0 7 19 102;B5 6 7;B4 0 11 73 102;A1 42 86 114;j=$?;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.

My MacBook Air shuts down when its more than half way charged and won't turn on unless I plug it in to the adapter? Why is this happening and how can I fix it?

My MacBook Air shuts down when its more than half way charged and won't turn on unless I plug it in to the adapter? Why is this happening and how can I fix it?

If you really do have a Mid 2013 Mac Air model then it is still in warranty, as the standard Apple warranty is one year from date of purchase. So take it into an Apple store and have it diagnosed and fixed under the warranty. There is some type of hardware problem that only Apple can fix.

Install maverik on my MacBook Pro, I had no problem. Two days later I was shut down suddenly and reboot with a closed padlock and asking me for a password that does not match any of mine. What I can do?

Install maverik on my MacBook Pro, I had no problem. Two days later I was shut down suddenly and reboot with a closed padlock and asking me for a password that does not match any of mine. What can I do?

Try booting to the Recovery drive, running Disk Utility and Repair disk and Repair Permissions.
1. Reboot and immediately hold down command and R (two keys).
2. When you see the screen shown on this page, select Disk Utility and continue.
3. When DU is running, select the hard drove on the left, First Aid and Repair Disk.
4. After Repair Disk, click Repair Permissions.
Quit DU and restart.

Macbook air shuts down and then keeps restarting on its on after every few minutes

My macbook air shuts down after starting the maching and then keep restarting and shutting down in a loop untill I close the lid.
I had bought this machine last november so have just about completed a year. Please help me identify the issue?

last November is more than a year
How long will it stay on until it restarts itself? logic board or battery failure.
Contact Apple for appt. for full in shop diagnostic and possible repair.

MacBook Air shuts down automatically

My MacBook Air shuts down automatically. It does not start up .
Any ideas?

Auto shutdowns outside of power feed issue indicates SSD or logic board failure.
Contact Apple for in shop free diagnostics and full evaluation for parts replacement. Avail yourself of the warranty you paid for

My macbook air shut down! Help!

My macbook air shut down because of battery level I'm guessing. now the keyboard is still lit up and the charger appears green, yet it won't turn on at all. Help!

Try holding the power key down for 10 seconds and then rebooting.
If that does not work try and SMC Reset.
http://support.apple.com/kb/HT3964

My MacBook Air shut down is slower than other macs I have seen

I think this is due to the recent Mac OS 10.8.2 update
My MacBook Air shuts down slower than usual. It will get slow and show a white screen with a spinining wheel taking up to 15 seconds.
This is longer than the startup time.
When it was new, I think it was running Mac OS 10.8.1. Shutdown was super speedy and took maybe just 3 seconds. It then asked me to update, so I obviously did, since I thought new improvments were made.
So how can I get rid of this slow shut down timings?

You might try resetting the SMC. If that does not work, take it in for service (you are under warranty).
Barry

My MacBook Pro shut down unexpectedly and won't connect to wifi now.

My MacBook Pro shut down unexpectedly and won't connect to wifi now. All other devices in my house are connecting to the wifi just fine. The laptop just refuses to connect. Any ideas on how to fix this/what it might mean?

Try a SMC reset:
http://support.apple.com/kb/HT3964
Follow directions for "A battery you should not remove yourself"
Check the mage safe connector and port for any debris.

My macbook pro shuts down OSX and all my programs when the lid is closed

Hi,
I am having a problem. My macbook pro shuts down OSX and all my programs when the lid is closed. I close the lid, and then I hear the shutdown music and then when I open it again it automatically restarts OSX and all my windows and programs are closed, any info gone.
This doesn't happen all the time. Just once a day or maybe twice a day. It seems like it happens basically when I have my computer just the way I want it, to keep an eye on things for the day.
I just recently switched to a mac and while somewhat savvy, I am not a programmer or techie, but it seems to me that when I shut the lid, it should do the same thing every time.
I have a intel core 2 duo 17 inch macbook pro with 2.33 processr and 2 gig ram, if that helps.
I am in alaska and there is no genius bar here and I am hoping to figure this out before I begin bugging our local independant mac store about this.
Thanks in advance,
Lylah
17 inch Macbook Pro Mac OS X (10.4.9) intel core 2 duo 2.33g. 2 gig ram

Ahhh, enlightenment!
That would make sense. What I usually do, after closing the lid, is to wait for the apple to turn off and then set it down on it's side leaning it against the side table. I will try to wait for it to indicate that it is fully asleep before I move it next time. Personally, I prefer my computer to NOT fall asleep at all, but I am told it is not an option. Apparently this function is hardware related accoring to my local mac shop. They tracked it down for me because I hated this feature when I first bought my computer and was trying some way around it.
The shutdown music I was refering to was that music the mac makes when shutting down, which doesnt usually occur when it goes to sleep, unless it is malfunctioning like this.
What does resetting the pmu do? (what is a pmu as well?)
Thank you very much.
Lylah

IMac shut down suddenly and won't boot back up

This morning my iMac shut down suddenly. All I had open was Google Chrome and I was just on Facebook and that's it. When I tried to boot it back up, it wouldn't load past the startup sound, wherein it would appear to shut back down,or at the very least the screen would go black (my mouse has lights that stay on when the computer is on, and the light kept going on and off while the screen remained black). This was the case for at least a half hour until it suddenly booted itself back up all on its own. I had it on throughout the day, just browsing the internet and watching Youtube. It shut itself down twice during the day, and both times it restarted on its own right away after showing me a grey screen with the Apple logo and a progress bar. Now it just shut itself down again and it won't make it past the progress bar screen - if it even makes it that far, sometimes it shuts off right after it makes the startup sound. It keeps trying to boot up on its own over and over again, but it keeps shutting down right away. All the fixes I've searched for so far require a computer that actually boots up all the way so I don't think I could run any reports if I tried!
I'm running the latest version of Yosemite (10.10.2?).
Model number A1311
Not entirely sure what specs are useful to know so I'm just gonna write some of what's on the box it came in:
3.2 GHz Intel i3 processor, 4MBshared level 3 cache
4GB of 1333MHz DDR SDRAM
1TB serial ATA hard drive
ATI Radeon HD 5670 graphics processor with 512 MB of GDDR3 memory
Bought it around fall of 2010. Not sure if it's worth trying to get it fixed (I live nowhere near an Apple store) or if I should just get a new computer, but I would like to know what's wrong, if possible.

Try to boot into the Recover Partition by holding down the Command + R keys on startup. If it still won't boot then the HD has probably crashed. The is likely a AASP in your area, you can locate one by clicking AASP Locator, take it to one to be professional diagnosed. If it's only the HD, assuming you have been backing up, restoring to a new HD is pretty simple.

My lenovo G505s shuts down suddenly and key board stops working at times

Hi,
I have bought this laptop 10 days ago, I am facing two problems 1st is, it shuts down(suddenly off not proper shut down) while working without showing any error message, and the problem no 2 is its key board stops working at times, system is working fine but all the buttons of key board are not responding. it will work when I restart the system.
please help what should I do, could it be replaced?

Welcome to the Lenovo Community !
Sorry to hear of your problems. I would suggest that you try a reset of the BIOS just to rule out any hardware conflicts the system may have. Try this........
1. Unplug the charger / adapter.
2. Remove the battery.
3. Press and hold the Power Button for 15 seconds.
4. Re-install the battery, plug in the charger / adapter if needed and power up the system to see if the problem was resolved.
If the problems weren't resolved by doing the reset then I suggest you contact Lenovo Support for warranty service. Both the problems you mentioned could be related to faulty hardware and the service center would be best equipped to check out your new laptop. You can find the phone number for Lenovo Support in your country or area by using the link below....
http://support.lenovo.com/us/en/supportphonelist_alt1
Owner & Operator of the following:
● Lenovo Ideapad Z570 w/ Win 7 & Win 8.1 Dual Boot ● Lenovo Yoga 3 Pro w/ Windows 8.1 ● Toshiba A75-S206 w/ Win 7
● IBM Thinkpad T-23 w/ Win XP ● IBM Thinkpad T-22 w/ Win XP • As well as multiple desktops dual/triple booting XP, Vista and Win 7.
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I downloaded silverlight to watch netflix but then my mac shut down suddenly and won't turn back on. How do i get it to turn on?

It's a brand new laptop and when i downloaded silverlight to stream netflix, it worked for like half an hour and then my computer just shuts down. i turn it on again and delete silverlight but a couple minutes later it shuts down again and this time it won't turn back on.

If it won't bong, then try an SMC reset.
http://support.apple.com/kb/HT3964
Can you boot in Safe Mode?
http://support.apple.com/kb/HT1564
Did you uninstall it this way?
http://www.microsoft.com/getsilverlight/get-started/install/removing-silverlight -mac.aspx

MacBook Air shuts down when I close it

Whenever I close my MacBook, it shuts down instead of going into sleep mode. At first, I thought it was a problem with my MacBook not waking up from sleep at all, but if I use the Sleep function from the drop down menu, it will wake up normally.
I've looked around the community to see if anyone had a similar issue, but most people say they need to reboot it to start it up again, which isn't my case at all. It just does a typical shut down. How do I make it go to sleep instead of shutting down when I close it?

Triple-click anywhere in the line below to select it:
bzgrep 'Previous Shutdown' /var/log/system.log*
Copy the selected text to the Clipboard (command-C).
Launch the 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. Click Utilities, then Terminal in the icon grid.
Paste into the Terminal window (command-V).
Post any lines of output that appear below what you entered — the text, please, not a screenshot.

My MacBook Air shut down suddenly and is making a loud ticking noise.

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