21.5 iMac freezing after lion

Brand new i5, upgraded to Lion, all recent updates installed...dont know the exact build of the os10.6.?. Now Im getting a frozen black screen. No response to keyborad or mouse input. Fan seems to still be running, and the only cure is to force restart with a hol-down of the power button. Its happeneing too much, *** "macs never crash" right?

Well I am sorry to say that four months later I still have all the problems mentioned in my original post. No updates or solutions have worked. In Lion whenever the system freezes or refuses to wake, the console shows a long list of GPU debug values.
The problem seems to only happen after being on for a long time. If sleep is enabled, it will not wake. If sleep is not enabled, after a while of not being used something--either a game, video, or itunes... will cause the UI to freeze. This makes it difficult to reproduce, and when I take the computer in to Apple, in the 30 minute genius session of course everything works just fine. I does not seem to be temperature related because when idle or asleep for a while the temps do not rise.
At this point I am regretting the purchase of this system. I seriously hope that Apple can resolve it soon. I am aware that many, many other iMac users have similar issues, but there has been no acknowledgement from Apple.
Not happy.

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IMac freezes after lion upgrade

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My imac freezes after 5 minutes of use

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Please read this whole message before doing anything.
This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
The purpose of the test is to determine whether the problem is caused by third-party software that loads automatically at startup or login, or by a peripheral device.
Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards. Boot in safe mode and log in to the account with the problem. Note: If FileVault is enabled, or if a firmware password is set, or if the boot volume is a software RAID, you can’t do this. Ask for further instructions.
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Just 4 days ago, I noticed that my iMac freezes after sleep, I haven't added or altered any programs nor downloaded any new software.
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Permissions Repair:
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My iMac set. with the new Mavericks has started freezing, or going into sleep mode, and will not wake up. I have to hold the power button in for about ten seconds to force it to close down, wait a few seconds, the press power button again and it will boot normally.
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<Personal Information Edited by Host>

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My Imac freezes after...

After being in sleep mode, my Imac freezes whenever I try to play internet-based video. It is the newest model and I've had it for about 6 weeks. It is realy frustrating!

You have 90 days Free Telephone Support... (3 Years if you Purchased AppleCare).
Give AppleCare a call and ask for assistance...

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Hi everyone,
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Hi Alex,
Try disconnecting everything from the Mac including power supply, give it a few seconds, while waiting unplug keyboard and plug into different USB PORT, now re-connect power supply and turn on machine... see if you can get your Mac to boot up properly... here's a link explaining the procedure: http://docs.info.apple.com/article.html?artnum=301733
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IMac freezing after update to Yosemite

Hi reader!
I'm struggling with my iMac after I've updated to Yosemite.
Problem description:
My iMac keeps crashing when I launch some specific demanding programs.
I tried to launch a game, Heroes of Newerth, it keeps freezing the iMac totally, after 10-15 sec.
When i launch videos on Facebook it does the same.
I can play movies in VLC and i can surf on the internet, but not watch youtube videos.
I’ve tried deleting apps like Adobe and Java, but can’t seem to delete Java to reinstall it.
These apps are being reinstalled as I write this.
The real issue is, it happened suddenly after some weeks after I updated to Yosemite, and i haven't updated anything else the last 2-3 days.
I am really in a pickle, with exam-reading coming up, and I have a lot of stuff backed up on a USB drive, but not it all.
I can't even get diskwarrior before it freezes up.
My specs are
iMac 24-inch, early 2009
Processor 2,93 GHz Intel core 2 duo
Memory 4 gb 1067 MHz DDR3
Graphics ATI Radeon HD 4850 512 MB
If more is needed, I'll be happy to provide it.
Thanks, appreciate the help!

The Etrecheck report:
Problem description:
My iMac keeps crashing when a launch some specific demanding programs.
I tried to launch a game Heroes of Newerth, it keeps freezing the iMac totally, after 10-15 sec.
When i launch videos on Facebook it does the same.
I can play movies in VLC and i can surf on the internet, but not watch youtube videos.
I’ve tried deleting apps like Adobe and Java, but can’t seem to delete Java to reinstall it.
EtreCheck version: 2.0.11 (98)
Report generated 19 Nov 2014 12:35:23 CET
Hardware Information: ℹ️
    iMac (24-inch, Early 2009) (Verified)
    iMac - model: iMac9,1
    1 2.93 GHz Intel Core 2 Duo 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
Video Information: ℹ️
    ATI Radeon HD 4850 - VRAM: 512 MB
        iMac 1920 x 1200
System Software: ℹ️
    OS X 10.10 (14A389) - Uptime: 0:13:24
Disk Information: ℹ️
    WDC WD6400AAKS-40H2B0 disk0 : (640,14 GB)
    S.M.A.R.T. Status: Verified
        EFI (disk0s1) <not mounted> : 210 MB
        Macintosh HD (disk0s2) / [Startup]: 639.28 GB (232.15 GB free)
        Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
    OPTIARC DVD RW AD-5670S
USB Information: ℹ️
    Apple, Inc. Keyboard Hub
        Apple Inc. Apple Keyboard
    Apple Inc. Built-in iSight
    Apple Inc. BRCM2046 Hub
        Apple Inc. Bluetooth USB Host Controller
    Apple Computer, Inc. IR Receiver
    Razer Razer Abyssus
Gatekeeper: ℹ️
    Mac App Store and identified developers
Problem System Launch Daemons: ℹ️
    [failed]    com.apple.ucupdate.plist
    [failed]    com.apple.watchdogd.plist
Launch Agents: ℹ️
    [not loaded]    com.oracle.java.Java-Updater.plist Support
Launch Daemons: ℹ️
    [not loaded]    com.adobe.fpsaud.plist Support
    [not loaded]    com.macpaw.CleanMyMac2.Agent.plist Support
    [not loaded]    com.microsoft.office.licensing.helper.plist Support
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User Launch Agents: ℹ️
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    [not loaded]    com.facebook.videochat.[redacted].plist Support
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User Login Items: ℹ️
    iTunesHelper    ApplicationHidden (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
Internet Plug-ins: ℹ️
    Flip4Mac WMV Plugin: Version: 3.2.0.16   - SDK 10.8 Support
    FlashPlayer-10.6: Version: 14.0.0.145 - SDK 10.6 Support
    Default Browser: Version: 600 - SDK 10.10
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    AdobePDFViewer: Version: 11.0.09 - SDK 10.6 Support
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    SharePointBrowserPlugin: Version: 14.4.5 - SDK 10.6 Support
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    JavaAppletPlugin: Version: Java 8 Update 25 Check version
3rd Party Preference Panes: ℹ️
    Flash Player Support
    Flip4Mac WMV Support
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Time Machine: ℹ️
    Time Machine not configured!
Top Processes by CPU: ℹ️
        87%    plugin-container
        29%    firefox
        24%    System Preferences
        11%    WindowServer
         0%    fontd
Top Processes by Memory: ℹ️
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    95 MB    WindowServer
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Virtual Memory Information: ℹ️
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Wow I have had a couple of days off and I see the discussion has advanced. I will upload a crash report next time it happens. Looking over the responses, Suitcase Fusion 3 is another culprit I have suspected of bringing on the freeze. Also yes it is mainly with Indesign and Illustrator that the freeze happens but Photoshop has frozen too but not as much. A typical scenario would be I leave my desk for 10 min or so and come back, wake my screen from sleep via the keyboard, only to find that one of the programs I was just using let say Indesign would be frozen with the spinning beach ball of doom. I would then command tab to illustrator only to see the same thing has happened to illustrator. Now Photoshop in this case would be a 1 in 4 chance of the same thing happenning at the same time. Now the unusual thing is that it doesn't always happen. I could go for a couple of days with no problems. I use the programs quite equally in a given day. Ive just got back into the habit of saving every time I get out of my seat, like back in the old days. Over the next week Ill monitor the behaviors of the programs and report it. As I am writing this I have just received an Email from Extensis saying there is an upgrade to suitcase fusion 3 14.2.0 with a whole lot of fixes. I'll give that a go as well.
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Steve.

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Man, do you have Sophos antivirus? If that so, you need to uninstall it the right way:
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Select 'Remove Sophos Anti-Virus.pkg'.
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Hi baltwo,
Im sorry but Im new to the community and I don't know how to address users directly. Hence intruding.
It would be kind of you to shed some light on the matter.
I'm running lion 10.7.5 and followed similar procedures but mail downloads every mail again after cataloging and indexing my earlier(snow leopard 10.6.5) mail. More details at https://discussions.apple.com/thread/5373643
It would be great to find a solution as I'm struggling since two weeks.
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21.5 iMac freezing after lion

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