Screen Tearing on Mid-2011 MBA with 10.8.5?

I've just updated my MBA Mid-2011 to 10.8.5, and have noticed consistent screen-tearing throughout. It's a slow phase that works bottom-to-top and moving any windows around shows a very clear tear (different accelerations either side, leading me to believe this is an issue with the double-buffering timing.) I am aware Apple have performed screensaver fixes(?) and am wondering if others have noticed a similar issue.
Steps to reproduce:
1) Open any windowed application (I used finder)
2) Click and drag window header bar, moving in smooth circular motions
3) Observe over 10-20 seconds this phase-line crawling up the screen breaking the double buffer paging
This wasn't here before, it would've irked me had it been before now. No idea how this'll be fixed without another update, as OS X doesn't really permit much in the way of display server configuration, but any suggestions welcome!

I didnt imply it was an SMC issue, but a diagnostic elimination step.
Ahhh, 10.8.5 .... So I assume Apple let you install same as a developer of the YET TO BE RELEASED 10.8.4
Im afraid theres going to be little assistance HERE for that, ...on an unreleased OSX.

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See the EtreCheck report below.
EtreCheck version: 2.1.8 (121)
Report generated 20 februari 2015 19:42:43 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.
Hardware Information: ℹ️
    iMac (27-inch, Mid 2011) (Technical Specifications)
    iMac - model: iMac12,2
    1 3.4 GHz Intel Core i7 CPU: 4-core
    16 GB RAM Upgradeable
        BANK 0/DIMM0
            4 GB DDR3 1333 MHz ok
        BANK 1/DIMM0
            4 GB DDR3 1333 MHz ok
        BANK 0/DIMM1
            4 GB DDR3 1333 MHz ok
        BANK 1/DIMM1
            4 GB DDR3 1333 MHz ok
    Bluetooth: Old - Handoff/Airdrop2 not supported
    Wireless: en1: 802.11 a/b/g/n
Video Information: ℹ️
    AMD Radeon HD 6970M - VRAM: 2048 MB
        iMac 2560 x 1440
System Software: ℹ️
    OS X 10.10.2 (14C109) - Time since boot: 0:53:6
Disk Information: ℹ️
    Hitachi HDS722020ALA330 disk1 : (2 TB)
        EFI (disk1s1) <not mounted> : 210 MB
        Macintosh HD (disk1s2) /Volumes/Macintosh HD : 1.98 TB (1.64 TB free)
    APPLE SSD TS256C disk0 : (251 GB)
        EFI (disk0s1) <not mounted> : 210 MB
        Macintosh SSD (disk0s2) / : 250.14 GB (228.92 GB free)
        Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
    HL-DT-STDVDRW GA32N
USB Information: ℹ️
    Apple Inc. FaceTime HD Camera (Built-in)
    Apple Inc. BRCM2046 Hub
        Apple Inc. Bluetooth USB Host Controller
    Apple Internal Memory Card Reader
    Apple Computer, Inc. IR Receiver
Thunderbolt Information: ℹ️
    Apple Inc. thunderbolt_bus
Gatekeeper: ℹ️
    Anywhere
Kernel Extensions: ℹ️
        /Library/Application Support/Avast/components/fileshield/unsigned
    [loaded]    com.avast.AvastFileShield (2.1.0 - SDK 10.9) [Click for support]
        /Library/Application Support/Avast/components/proxy/unsigned
    [loaded]    com.avast.PacketForwarder (2.0 - SDK 10.9) [Click for support]
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    [loaded]    com.avast.userinit.plist [Click for support]
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IMac (27", mid 2011) slowed with many, many errors on startup...help?

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Console (a dozen lines)
6/10/14 11:25:34.000 AM kernel[0]: Sandbox: mds_stores(188) deny file-read-data /Applications/Utilities/VoiceOver Utility.app/Contents/MacOS/VoiceOver Utility/..namedfork/rsrc
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Hardware Information:
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                    Recovery HD (disk0s3) <not mounted>: 650 MB
                    eDrive (disk0s4) <not mounted>: 12 GB
          OPTIARC DVD RW AD-5690H
USB Information:
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          Mitsumi Electric Hub in Apple Extended USB Keyboard
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                    Mitsumi Electric Apple Extended USB Keyboard
          Apple Inc. BRCM2046 Hub
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Thunderbolt Information:
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Gatekeeper:
          Mac App Store and identified developers
Kernel Extensions:
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          [kext loaded] com.AmbrosiaSW.AudioSupport (4.1.2 - SDK 10.6) Support
          [not loaded] com.Avid.driver.AvidDX (4.9.2) Support
          [not loaded] com.SafeNet.driver.Sentinel (7.3.0) Support
          [not loaded] com.avid.driver.Avid_SCSI (1.2.0) Support
          [not loaded] com.avid.driver.Avid_SCSI_RBC (1.2.0) Support
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          [not loaded] com.digidesign.mbox2.boot.driver (8.0.4f1) Support
          [not loaded] com.digidesign.mbox2.driver (8.0.4f1) Support
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          [not loaded] com.paceap.kext.PACESupport (5.7.2b8) Support
          [not loaded] com.paceap.kext.PACESupport2 (5.7.2b8) Support
          [not loaded] com.paceap.kext.pacesupport.leopard (5.7.2b8) Support
          [not loaded] com.paceap.kext.pacesupport.master (5.7.2b8) Support
          [not loaded] com.paceap.kext.pacesupport.panther (5.7.2b8) Support
          [kext loaded] com.paceap.kext.pacesupport.snowleopard (5.7.2b8) Support
          [not loaded] com.paceap.kext.pacesupport.tiger (5.7.2b8) Support
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Startup Items:
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          [running] com.symantec.sharedsettings.plist Support
          [running] com.symantec.symdaemon.plist Support
          [loaded] PACESupport.plist Support
Launch Agents:
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          [loaded] com.adobe.CS5ServiceManager.plist Support
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User Launch Agents:
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          [running] ws.agile.1PasswordAgent.plist Support
User Login Items:
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          DragThing
Internet Plug-ins:
          Flip4Mac WMV Plugin: Version: 3.2.0.16   - SDK 10.8 Support
          FlashPlayer-10.6: Version: 14.0.0.125 - SDK 10.6 Support
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          SharePointBrowserPlugin: Version: 14.2.3 - SDK 10.6 Support
          Silverlight: Version: 5.1.10411.0 - SDK 10.6 Support
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Safari Extensions:
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          DoNotTrackMe: Online Privacy Protection: Version: 3.1.1064
          Amazon Shopping Assistant: Version: 1.1
          Video Converter: Version: 4.0.0
          Slick Savings: Version: 2.0
          Searchme: Version: 1.3
          1Password: Version: 4.2.1
Audio Plug-ins:
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          AirPlay: Version: 2.0 - SDK 10.9
          AppleAVBAudio: Version: 203.2 - SDK 10.9
          iSightAudio: Version: 7.7.3 - SDK 10.9
iTunes Plug-ins:
          Quartz Composer Visualizer: Version: 1.4 - SDK 10.9
User Internet Plug-ins:
          Google Earth Web Plug-in: Version: 7.1 Support
3rd Party Preference Panes:
          A Better Finder Preferences Support
          Default Folder X Support
          Flash Player Support
          MenuMeters Support
          Norton\nQuickMenu Support
          TechTool Protection Support
Time Machine:
          Skip System Files: NO
          Mobile backups: OFF
          Auto backup: NO - Auto backup turned off
          Volumes being backed up:
                    Macintosh HD: Disk size: 919.42 GB Disk used: 862.81 GB
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                    Total size: 2
                    Total number of backups: 36
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                    Last backup: 2014-05-02 19:20:57 +0000
                    Size of backup disk: Too small
                              Backup size 2 < (Disk used 862.81 GB X 3)
          Time Machine details may not be accurate.
          All volumes being backed up may not be listed.
Top Processes by CPU:
               2%          WindowServer
               1%          1Password 4
               1%          PluginProcess
               0%          fontd
               0%          SystemUIServer
Top Processes by Memory:
          246 MB          mds_stores
          229 MB          Safari
          213 MB          com.apple.IconServicesAgent
          115 MB          Dropbox
          98 MB          Finder
Virtual Memory Information:
          10.65 GB          Free RAM
          3.14 GB          Active RAM
          762 MB          Inactive RAM
          1.46 GB          Wired RAM
          519 MB          Page-ins
          0 B          Page-outs
Thanks for reading this far... ;-)
joe holly

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.
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. All it does is to collect information about the state of the computer. That information goes nowhere unless you choose to share it. However, you should be cautious about running any kind of program (not just a shell script) at the behest of a stranger. If you have doubts, search this site for other discussions in which this procedure has been followed without any report of ill effects. If you can't satisfy yourself that the instructions are safe, don't follow them. Ask for other options.
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.
4. You may have started the computer in "safe" mode. Preferably, these steps should be taken in “normal” mode, under the conditions in which the problem is reproduced. 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.
5. 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.
6. 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=(Software Hardware Memory Diagnostics Power FireWire Thunderbolt USB Fonts 51 4 1000 25 5120 KiB/s 1024 85 \\b%% 20480 1 MB/s 25000 ports 'com.autodesk.AutoCad com.evenflow.dropbox com.google.GoogleDrive' DYLD_INSERT_LIBRARIES\ DYLD_LIBRARY_PATH -86 ` route -n get default|awk '/e:/{print $2}' ` 25 N\\/A down up 102400 25600 recvfrom sendto CFBundleIdentifier 25 25 25 1000 MB );N5=${#p[@]};p[N5]=` networksetup -listnetworkserviceorder|awk ' NR>1 { sub(/^$[0-9]+$ /,"");n=$0;getline;} $NF=="'${p[26]}')" { sub(/.$/,"",$NF);print n;exit;} ' `;f=('\n%s: %s\n' '\n%s\n\n%s\n' '\nRAM details\n%s\n' %s\ %s '%s\n\t(%s)\n' );S0() { echo ' { q=$NF+0;$NF="";u=$(NF-1);$(NF-1)="";gsub(/^ +| +$/,"");if(q>='${p[$1]}') printf("%s (UID %s) is using %s '${p[$2]}'",$0,u,q);} ';};s=(' /^ *$|CSConfigDot/d;s/^ */   /;s/[-0-9A-Fa-f]{22,}/UUID/g;s/(ochat)\.[^.]+(\..+)/\1\2/;/Shared/!s/\/Users\/[^/]+/~/g ' ' s/^ +//;5p;6p;8p;12p;' ' {sub(/^ +/,"")};NR==6;NR==13&&$2<'${p[10]} ' 1s/://;3,6d;/[my].+:/d;s/^ {4}//;H;${ g;s/\n$//;/s: [^EO]|x([^08]|02[^F]|8[^0])/p;} ' ' 5h;6{ H;g;/P/!p;} ' ' ($1~/^Cy/&&$3>'${p[11]}')||($1~/^Cond/&&$2!~/^N/) ' ' /:$/{ N;/:.+:/d;s/ *://;b0'$'\n'' };/^ *(V.+ [0N]|Man).+ /{ s/ 0x.... //;s/[()]//g;s/(.+: )(.+)/ (\2)/;H;};$b0'$'\n'' d;:0'$'\n'' x;s/\n\n//;/Apple[ ,]|Intel|SMSC/d;s/\n.*//;/\)$/p;' ' s/^.*C/C/;H;${ g;/No th|pms/!p;} ' '/= [^GO]/p' '{$1=""};1' ' /Of/!{ s/^.+is |\.//g;p;} ' ' $0&&!/ / { n++;print;} END { if(n<200) print "com.apple.";} ' ' $3~/[0-9]:[0-9]{2}$/ { gsub(/:[0-9:a-f]{14}/,"");} { print|"tail -n'${p[12]}'";} ' ' NR==2&&$4<='${p[13]}' { print $4;} ' ' END { $2/=256;if($2>='${p[15]}') print int($2) } ' ' NR!=13{next};{sub(/[+-]$/,"",$NF)};'"`S0 21 22`" 'NR!=2{next}'"`S0 37 17`" ' NR!=5||$8!~/[RW]/{next};{ $(NF-1)=$1;$NF=int($NF/10000000);for(i=1;i<=3;i++){$i="";$(NF-1-i)="";};};'"`S0 19 20`" 's:^:/:p' '/\.kext\/(Contents\/)?Info\.plist$/p' 's/^.{52}(.+) <.+/\1/p' ' /Launch[AD].+\.plist$/ { n++;print;} END { if(n<200) print "/System/";} ' '/\.xpc\/(Contents\/)?Info\.plist$/p' ' NR>1&&!/0x|\.[0-9]+$|com\.apple\.launchctl\.(Aqua|Background|System)$/ { print $3;} ' ' /\.(framew|lproj)|\):/d;/plist:|:.+(Mach|scrip)/s/:[^:]+//p ' '/root/p' ' !/\/Contents\/.+\/Contents|Applic|Autom|Frameworks/&&/Lib.+\/Info.plist$/ { n++;print;} END { if(n<1000) print "/System/";} ' '/^\/usr\/lib\/.+dylib$/p' ' /Temp|emac/d;/(etc|Preferences)\//s/^\.\/[^/]+//p;' ' /\/(Contents\/.+\/Contents|Frameworks)\/|\.wdgt\/.+\.([bw]|plu)/d;p;' 's/\/(Contents\/)?Info.plist$//;p' ' { gsub("^| ","||kMDItem'${p[35]}'=");sub("^.."," ") };1 ' p '{print $3"\t"$1}' 's/\'$'\t''.+//p' 's/1/On/p' '/Prox.+: [^0]/p' '$2>'${p[9]}'{$2=$2-1;print}' ' BEGIN { i="'${p[26]}'";M1='${p[16]}';M2='${p[18]}';M3='${p[31]}';M4='${p[32]}';} !/^A/ { next;} /%/ { getline;if($5<M1) a="user "$2"%, system "$4"%";} /disk0/&&$4>M2 { b=$3" ops/s, "$4" blocks/s";} $2==i { if(c) { d=$3+$4+$5+$6;next;};if($4>M3||$6>M4) c=int($4/1024)" in, "int($6/1024)" out";} END { if(a) print "CPU: "a;if(b) print "I/O: "b;if(c) print "Net: "c" (KiB/s)";if(d) print "Net errors: "d" packets/s";} ' ' /r\[0\] /&&$NF!~/^1(0|72\.(1[6-9]|2[0-9]|3[0-1])|92\.168)\./ { print $NF;exit;} ' ' !/^T/ { printf "(static)";exit;} ' '/apsd|OpenD/!s/:.+//p' ' (/k:/&&$3!~/(255\.){3}0/ )||(/v6:/&&$2!~/A/ ) ' ' $1~"lR"&&$2<='${p[25]}';$1~"li"&&$3!~"wpa2";' ' BEGIN { FS=":";} { n=split($3,a,".");sub(/_2[01].+/,"",$3);print $2" "$3" "a[n]" "$1;b=b$1;} END { if(b) print("\n\t* Code injection");} ' ' NR!=4{next} {$NF/=10240} '"`S0 27 14`" ' END { if($3~/[0-9]/)print$3;} ' ' BEGIN { L='${p[36]}';} !/^[[:space:]]*(#.*)?$/ { l++;if(l<=L) f=f"\n   "$0;} END { F=FILENAME;if(!F) exit;if(!f) f="\n   [N/A]";"file -b "F|getline T;if(T!~/^(AS.+ (En.+ )?text$|POSIX sh.+ text ex)/) F=F" ("T")";printf("\nContents of %s\n%s\n",F,f);if(l>L) printf("\n   ...and %s more line(s)\n",l-L);} ' ' BEGIN{FS="= "} /Path/{print $2} ' ' /^ +B/{ s/.+= |(-[0-9]+)?\.s.+//g;p;} ' ' END{print NR} ' ' /id: N|te: Y/{i++} END{print i} ' ' / /{$0="'"${p[28]}"'"};1;' '/ en/!s/\.//p' ' NR!=13{next};{sub(/[+-M]$/,"",$NF)};'"`S0 39 40`" ' $10~/$L/&&$9!~"localhost" { sub(/.+:/,"",$9);print $1": "$9;} ' '/^ +r/s/.+"(.+)".+/\1/p' 's/(.+\.wdgt)\/(Contents\/)?Info\.plist$/\1/p' 's/^.+\/(.+)\.wdgt$/\1/p' 's/0/Off/p' );c1=(system_profiler pmset\ -g nvram fdesetup find syslog df vm_stat sar ps sudo\ crontab sudo\ iotop top pkgutil PlistBuddy whoami cksum kextstat launchctl sudo\ launchctl crontab 'sudo defaults read' stat lsbom mdfind ' for i in ${p[24]};do ${c1[18]} ${c2[27]} $i;done;' defaults\ read scutil sudo\ dtrace sudo\ profiles sed\ -En awk /S*/*/P*/*/*/C*/*/airport networksetup mdutil sudo\ lsof test );c2=(com.apple.loginwindow\ LoginHook '-c Print /L*/P*/loginw*' '-c Print L*/P*/*loginit*' '-c Print L*/Saf*/*/E*.plist' '~ $TMPDIR.. \( -flags +sappnd,schg,uappnd,uchg -o ! -user $UID -o ! -perm -600 $' '.??* -path .Trash -prune -o -type d -name *.app -print -prune' '-c Print\ :'${p[35]}' 2>&1' '-c Print\ :Label 2>&1' '{/,}L*/{Con,Pref}* -type f ! -size 0 -name *.plist -exec plutil -s {} \;' "-f'%N: %l' Desktop L*/Keyc*" therm sysload boot-args status " -F '\$Time \$Message' -k Sender kernel -k Message Req 'Beac|caug|dead[^bl]|FAIL|GPU |hfs: Ru|inval|jnl:|last value [1-9]|n Cause: -|NVDA$|pagin|proc: t|Roamed|rror|ssert|Thrott|tim(ed? ?|ing )o|WARN' -k Message Rne 'Goog|ksadm|SMC:' -o -k Sender fseventsd -k Message Req 'SL' " '-du -n DEV -n EDEV 1 10' 'acrx -o comm,ruid,%cpu' '-t1 10 1' '-f -pfc /var/db/r*/com.apple.*.{BS,Bas,Es,OSXU,Rem,up}*.bom' '{/,}L*/Lo*/Diag* -type f -regex .\*[cgh] ! -name *ag \( -exec grep -lq "^Thread c" {} \; -exec printf \* \; -o -true $ -execdir stat -f:%Sc:%N -t%F {} \;|sort -t: -k2 |tail -n'${p[38]} '-L {/{S*/,},}L*/Lau* -type f' '-L /{S*/,}L*/StartupItems -type f -exec file {} +' '-L /S*/L*/{C*/Sec*A,E}* {/,}L*/{A*d,Ca*/*/Ex,Compon,Ex,In,iTu,Keyb,Mail/B,P*P,Qu*T,Scripti,Sec,Servi,Spo,Widg}* -type f -name Info.plist' '/usr/lib -type f -name *.dylib' `awk "${s[31]}"<<<${p[23]}` "/e*/{auto,{cron,fs}tab,hosts,[lps]*.conf,pam.d,ssh{,d}_config,*.local} {,/usr/local}/etc/periodic/*/* /L*/P*{,/*}/com.a*.{Bo,sec*.ap}* .launchd.conf" list getenv /Library/Preferences/com.apple.alf\ globalstate --proxy '-n get default' -I --dns -getdnsservers -getinfo\ "${p[N5]}" -P -m\ / '' -n1 '-R -l1 -n1 -o prt -stats command,uid,prt' '--regexp --only-files --files com.apple.pkg.*|sort|uniq' -kl -l -s\ / '-R -l1 -n1 -o mem -stats command,uid,mem' -i4TCP:0-1023 com.apple.dashboard\ layer-gadgets '-d /L*/Mana*/$USER&&echo On' '-app Safari WebKitDNSPrefetchingEnabled' );N1=${#c2[@]};for j in {0..8};do c2[N1+j]=SP${p[j]}DataType;done;N2=${#c2[@]};for j in 0 1;do c2[N2+j]="-n ' syscall::'${p[33+j]}':return { @out[execname,uid]=sum(arg0) } tick-10sec { trunc(@out,1);exit(0);} '";done;l=(Restricted\ files Hidden\ apps 'Elapsed time (s)' POST Battery Safari\ extensions Bad\ plists 'High file counts' User Heat System\ load boot\ args FileVault Diagnostic\ reports Log 'Free space (MiB)' 'Swap (MiB)' Activity 'CPU per process' Login\ hook 'I/O per process' Mach\ ports kexts Daemons Agents launchd Startup\ items Admin\ access Root\ access Bundles dylibs Apps Font\ issues Inserted\ dylibs Firewall Proxies DNS TCP/IP Wi-Fi Profiles Root\ crontab User\ crontab 'Global login items' 'User login items' Spotlight Memory Listeners Widgets Parental\ Controls Prefetching );N3=${#l[@]};for i in 0 1 2;do l[N3+i]=${p[5+i]};done;N4=${#l[@]};for j in 0 1;do l[N4+j]="Current ${p[29+j]}stream data";done;A0() { id -G|grep -qw 80;v[1]=$?;((v[1]==0))&&sudo true;v[2]=$?;v[3]=`date +%s`;clear >&-;date '+Start time: %T %D%n';};for i in 0 1;do eval ' A'$((1+i))'() { v=` eval "${c1[$1]} ${c2[$2]}"|'${c1[30+i]}' "${s[$3]}" `;[[ "$v" ]];};A'$((3+i))'() { v=` while read i;do [[ "$i" ]]&&eval "${c1[$1]} ${c2[$2]}" \"$i\"|'${c1[30+i]}' "${s[$3]}";done<<<"${v[$4]}" `;[[ "$v" ]];};A'$((5+i))'() { v=` while read i;do '${c1[30+i]}' "${s[$1]}" "$i";done<<<"${v[$2]}" `;[[ "$v" ]];};';done;A7(){ v=$((`date +%s`-v[3]));};B2(){ v[$1]="$v";};for i in 0 1;do eval ' B'$i'() { v=;((v['$((i+1))']==0))||{ v=No;false;};};B'$((3+i))'() { v[$2]=`'${c1[30+i]}' "${s[$3]}"<<<"${v[$1]}"`;} ';done;B5(){ v[$1]="${v[$1]}"$'\n'"${v[$2]}";};B6() { v=` paste -d: <(printf "${v[$1]}") <(printf "${v[$2]}")|awk -F: ' {printf("'"${f[$3]}"'",$1,$2)} ' `;};B7(){ v=`grep -Fv "${v[$1]}"<<<"$v"`;};C0(){ [[ "$v" ]]&&echo "$v";};C1() { [[ "$v" ]]&&printf "${f[$1]}" "${l[$2]}" "$v";};C2() { v=`echo $v`;[[ "$v" != 0 ]]&&C1 0 $1;};C3() { v=`sed -E "$s"<<<"$v"`&&C1 1 $1;};for i in 1 2;do for j in 2 3;do eval D$i$j'(){ A'$i' $1 $2 $3; C'$j' $4;};';done;done;{ A0;A2 0 $((N1+1)) 2;C0;A1 0 $N1 1;C0;B0;C2 27;B0&&! B1&&C2 28;D12 15 37 25 8;A1 0 $((N1+2)) 3;C0;D13 0 $((N1+3)) 4 3;D23 0 $((N1+4)) 5 4;for i in 0 1 2;do D13 0 $((N1+5+i)) 6 $((N3+i));done;D13 1 10 7 9;D13 1 11 8 10;D22 2 12 9 11;D12 3 13 10 12;D23 4 19 44 13;D23 5 14 12 14;D22 6 36 13 15;D22 7 37 14 16;D23 8 15 38 17;D22 9 16 16 18;B1&&{ D22 11 17 17 20;for i in 0 1;do D22 28 $((N2+i)) 45 $((N4+i));done;};D22 12 44 54 45;D22 12 39 15 21;A1 13 40 18;B2 4;B3 4 0 19;A3 14 6 32 0;B4 0 5 11;A1 17 41 20;B7 5;C3 22;B4 4 6 21;A3 14 7 32 6;B4 0 7 11;B3 4 0 22;A3 14 6 32 0;B4 0 8 11;B5 7 8;B1&&{ A2 19 26 23;B7 7;C3 23;};A2 18 26 23;B7 7;C3 24;A2 4 20 21;B7 6;B2 9;A4 14 7 52 9;B2 10;B6 9 10 4;C3 25;D13 4 21 24 26;B4 4 12 26;B3 4 13 27;A1 4 22 29;B7 12;B2 14;A4 14 6 52 14;B2 15;B6 14 15 4;B3 0 0 30;C3 29;A1 4 23 27;B7 13;C3 30;D13 24 24 32 31;D13 25 37 32 33;A1 23 18 28;B2 16;A2 16 25 33;B7 16;B3 0 0 34;B2 21;A6 47 21&&C0;B1&&{ D13 21 0 32 19;D13 10 42 32 40;D22 29 35 46 39;};D23 14 1 48 42;D12 34 43 53 44;D22 0 $((N1+8)) 51 32;D13 4 8 41 6;D12 26 28 35 34;D13 27 29 36 35;A2 27 32 39&&{ B2 19;A2 33 33 40;B2 20;B6 19 20 3;};C2 36;D23 33 34 42 37;B1&&D23 35 45 55 46;D23 32 31 43 38;D12 36 47 32 48;D13 20 42 32 41;D23 14 2 48 43;D13 4 5 32 1;D22 4 4 50 0;D13 14 3 49 5;D12 26 48 59 49;B3 4 22 57;A1 26 46 56;B7 22;B3 0 0 58;C3 47;D23 22 9 37 7;A7;C2 2;} 2>/dev/null|pbcopy;exit 2>&-
Copy the selected text to the Clipboard by pressing the key combination command-C.
7. 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. Click Utilities, then Terminal in the icon grid.
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.
8. If you see an error message in the Terminal window such as "syntax error," enter
exec bash
and press return. Then paste the script again.
9. 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. In most cases, the difference is not important. If you don't know the password, or if you prefer not to enter it, press the key combination control-C or 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.
10. 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, there will be nothing in the Terminal window and no indication of progress. Wait for the line
[Process completed]
to appear. If you don't see it within half an hour or so, the test probably won't complete in a reasonable time. In that case, close the Terminal window and report the results. No harm will be done.
11. When the test is complete, 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 "Model Identifier." 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.
12. When you post the results, you might see the message, "You have included content in your post that is not permitted." It means that the forum software has misidentified something in the post as a violation of the rules. If that happens, please post the test results on Pastebin, then post a link here to the page you created.
Note: This is a public forum, and others may give you advice based on the results of the test. They speak only for themselves, and I don't necessarily agree with them.
Copyright © 2014 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.

Can I use my mid 2011 iMac with an Xbox 360?

Hello all, I have been unable to find a definative answer to this question so thought it best to ask here. Question being can I connect an Xbox 360 to my mid 2011 21.5 iMac and use it as a monitor for gaming? If this is possible, could you tell me how seeing as the iMac doesn't have a hdmi input?
Help greatly appreciated.
Thanks in advance.

For the 2009 and 2010 27" iMacs there is the Kanex XD http://www.kanexlive.com/xd but it is not compatible with ThunderBolt iMacs as Kanex states in their Product FAQs.
2011 ThunderBolt iMac only accept other ThunderBolt Macs as source.
http://docs.info.apple.com/article.html?path=Thunderbolt/10.6/en/30822.html
The Intensity Extreme http://www.blackmagic-design.com/uk/products/intensity/ might be what you need once it is released.
Stefan

Airplay icon missing - iMac mid 2011 type with Mavericks installed

Hi,
I am having a problem with Airplay. I have installed Mavericks on my iMac Mid 2011 type and noticed that the airplay icon does not appear on the menu bar as advertised by apple. I am able to play both music and video through the itunes but I am not able to do any mirroring. The airplay display does not even appear in the display settings. Also, I am prevented from using any other alternative solution such as AirParrot. It just gives me a connection blocked error. I have checked the firewall and all is ok. I would really appreciate some help.
Thanks!
Hardware Overview:
Model Name:          iMac
Model Identifier:          iMac12,2
Processor Name:          Intel Core i5
Processor Speed:          2.7 GHz
Number of Processors:          1
Total Number of Cores:          4
L2 Cache (per Core):          256 KB
L3 Cache:          6 MB
Memory:          4 GB
Boot ROM Version:          IM121.0047.B1F
Graphics: AMD Radeon HD 6770M 512 MB

Okay.
You need Mountain Lion 10,8
http://www.apple.com/osx/

Sell 2011 MBA with Lion

I'm considering selling my MBA with Lion. If the new buyer registers the computer in his or her name, will they be able to download iLife applications from the app store with their apple id? If I do a clean install of Lion, when they first start it up will they be able to change the ownership of the computer to themselves and then install iLife?

If past history is any indicator, the backup media which will be included with your unit will be model specific. As such, it won't be usable for any other of your Macs. Moreover, the license will only permit legal use only on the one computer. However, that one license will permit multiple copies to be run on that one computer, if so desired. That has been confirmed.
However, as Mr Boyd points out, this particular OS X release is different in many respects. It just may be that no media will be included, and a backup will have to be downloaded. Whether that download will be the same for all users is yet to be seen. Really, any definitive answer is then only speculation.

I am unable to mirror the screen from a Mid 2011 iMac using AirPlay?

All I get is a black screen.
I am running OS10.10.
EVERYTHING is up to date.
Both are on the same wifi network.
iTunes WILL play to the AppleTV 3d generation.
AppleTV is up to date also.
When i open the icon on the menu bar, I can see Mirror iMac and Extend Desktop.
Only Extend Desktop can be checked.
I have restarted the Netgear R7000 router (up to date), the AppleTV, and the iMac.
No luck.
Thanks in advance.

Is anyone having this problem? iTunes will play from the iMac (10.10) to the Apple TV (7.0.1) video and audio no problem iPad Air 2 and iPhone 6 (8.1) also. I can NOT select Mirror iMac at all.

I have a mid 2011 iMac with 2 thunderbolt ports that I have never been able to get to work.

I purchased two Segate adapters and drives but if I can get them to run at all they will eventually freeze up the computer and I will have to reboot. I just tried them again today and the computer does not even see them. Has anyone else had this problem and did you get it resolved. I took it to the Apple store once and as you would know after a system reset it worked I took it home and within an houre it froze up the system and I have not gotten it to work since.

Take it back to the Apple Store and leave it there so that they can check it out for a couple of days at least with the disks.
Allan

Verify Disk Fails on 11" Mid-2011 MBA

Hi,
When using Disk Utility to Verify Disk, I get the following error:
Unable to bootstrap transaction group 1877: invalid field value
No valid commit checkpoint found
The volume 5E475AC6-27BF-4533-89F3-A1E555405EDA was found corrupt and needs to be repaired.
Problems were found with the partition map which might prevent booting
Error: Storage system verify or repair failed.
I tried searching, but didn't seem to be able to find anything related. Anybody have any ideas?
Thanks!

I have the same problem and my drive is encrypted with Filevault 2. Here is a copy of my Disk Utility results-
Verifying partition map for “TOSHIBA MK7559GSXF Media”
Checking prerequisites
Checking the partition list
Checking for an EFI system partition
Checking the EFI system partition’s size
Checking the EFI system partition’s file system
Checking all HFS data partition loader spaces
Checking Core Storage Physical Volume partitions
Checking storage system
Checking volume.
disk0s2: Scan for Volume Headers
disk0s2: Scan for Disk Labels
Logical Volume Group D6C6B140-FF84-4215-A23B-2F338FDB07DE spans 1 device
Logical Volume Group has a 16 MB Metadata Volume with double redundancy
Start scanning metadata for a valid checkpoint
Load and verify Segment Headers
Load and verify Checkpoint Payload
Load and verify Transaction Segment
Load and verify Transaction Segment
Incorporate 1 newer non-checkpoint transactions
Load and verify Virtual Address Table
Load and verify Segment Usage Table
Load and verify Metadata Superblock
Load and verify Logical Volumes B-Trees
Logical Volume Group contains 1 Logical Volumes
Load and verify BFACC386-1738-482F-B4C8-438DC4A8850E
Load and verify F8E6D497-E9AC-41A4-9917-AD101492A4C9
Load and verify Freespace Summary
Load and verify Block Accounting
Load and verify Segment Cleaning
Unable to bootstrap transaction group 5720: invalid field value
Continue scanning metadata for an older checkpoint
Load and verify Segment Headers
Load and verify Checkpoint Payload
Load and verify Transaction Segment
Incorporate 0 newer non-checkpoint transactions
Load and verify Virtual Address Table
Load and verify Segment Usage Table
Load and verify Metadata Superblock
Load and verify Logical Volumes B-Trees
Logical Volume Group contains 1 Logical Volumes
Load and verify BFACC386-1738-482F-B4C8-438DC4A8850E
Load and verify F8E6D497-E9AC-41A4-9917-AD101492A4C9
Load and verify Freespace Summary
Load and verify Block Accounting
Load and verify Segment Cleaning
Unable to bootstrap transaction group 5719: invalid field value
Continue scanning metadata for an older checkpoint
Load and verify Segment Headers
Load and verify Checkpoint Payload
Load and verify Transaction Segment
Incorporate 0 newer non-checkpoint transactions
Load and verify Virtual Address Table
Load and verify Segment Usage Table
Load and verify Metadata Superblock
Load and verify Logical Volumes B-Trees
Logical Volume Group contains 1 Logical Volumes
Load and verify BFACC386-1738-482F-B4C8-438DC4A8850E
Load and verify F8E6D497-E9AC-41A4-9917-AD101492A4C9
Load and verify Freespace Summary
Load and verify Block Accounting
Load and verify Segment Cleaning
Unable to bootstrap transaction group 5718: invalid field value
Continue scanning metadata for an older checkpoint
Load and verify Segment Headers
Load and verify Checkpoint Payload
Load and verify Transaction Segment
Incorporate 0 newer non-checkpoint transactions
Load and verify Virtual Address Table
Load and verify Segment Usage Table
Load and verify Metadata Superblock
Load and verify Logical Volumes B-Trees
Logical Volume Group contains 1 Logical Volumes
Load and verify BFACC386-1738-482F-B4C8-438DC4A8850E
Load and verify F8E6D497-E9AC-41A4-9917-AD101492A4C9
Load and verify Freespace Summary
Load and verify Block Accounting
Load and verify Segment Cleaning
Unable to bootstrap transaction group 5717: invalid field value
No valid commit checkpoint found
The volume D6C6B140-FF84-4215-A23B-2F338FDB07DE was found corrupt and needs to be repaired.
Problems were found with the partition map which might prevent booting
Error: Storage system verify or repair failed.
This is a brand spanking new Macbook Pro 8,2 with a clean install of lion with my user account migrated from a time machine backup. The weird thing is that if I boot to the recovery partition and verify the disk, it comes back clean with no errors. When I log in again and run disk utility immediately after logging in, disk utility shows no errors. I only get these errors after the machine has been on for a while.
I have tried just doing a repair disk in the recovery partition to see if it would help but I still get the same errors after a few hours of use. I think there is a bug with Filevault.
I am using 10.7.1

Screen Tearing on Mid-2011 MBA with 10.8.5?

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