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Late 2009 27" iMac - Random freezes

1413 Views 7 Replies Latest reply: Feb 13, 2014 7:20 AM by Jsh1971 RSS
Jsh1971 Level 1 Level 1 (0 points)
Currently Being Moderated
Feb 26, 2012 3:25 PM

The last several months my 27" iMac has been freezing at random times.  I can't reproduce the freeze on my own and it only occurs maybe once or twice a day.  When it does freeze the mouse can still move the pointer around but everything is unresponsive otherwise necessitating a hard reboot.

 

I actually rolled back to Snow Leopard at one point thinking it was an issue attributed to Lion, but still had the problem.

 

I will most likely have to take this into the Apple store but thought I'd see if anyone else has experienced the issue before I made that long trip...

iMac, Mac OS X (10.7.3)
  • TeenTitan Level 4 Level 4 (2,410 points)
    Currently Being Moderated
    Feb 26, 2012 7:58 PM (in response to Jsh1971)

    Do you have any thing attached to the computer besides the keyboard and mouse? if so, have you tried disconnecting those extra items from the computer? if so, do you still have the items when those decies are disconnected?

    Have you checked to make sure your software is up todate? (apple menu, software udpate)

    Have you ran disk utility to verify the disk? dose it check out with no erros?

    What is the smart status of the built in drive in disk utility?

    Have you tried runng apple hardware test? Do you get an error message? if so, what error message?

    when the computer freezes, can you use the sound up or sound down on the keyboard? if so dose it respound?

    What about trying to force quit an application when the computer 'freezes

    Have you tried a safeboot?

    Have you tried a SMC reset? have you tried a NVRAM Reset?

    If you disable sleep, do you still have the issue?

    Has the computer been ugpraded in any way?

    What are you doing when the comptuer freezes? what applications are open? Dose it matter what applications you have open?

  • TeenTitan Level 4 Level 4 (2,410 points)
    Currently Being Moderated
    Feb 29, 2012 9:27 PM (in response to Jsh1971)

    Jsh1971 wrote:

    What is the smart status of the built in drive in disk utility?  I'm not sure how to check this.  I'll look into it.

    If a drive has a failing smart status; the text of the drive would be red in disk utilty. But not all hard drives support SMART status.

    Jsh1971 wrote:

    Do you have any thing attached to the computer besides the keyboard and mouse? Yes.  A USB hub with several external data drives, one being the TimeMachine backup device. 

    A failing external drive could cause cause all the symptoms your describing.

    Jsh1971 wrote:

    The last freeze occured within 2 minutes of waking the computer from sleep.

    A failing drive might act up after sleep. Considering this is when the disk has to spin up, start to read data off of the hard drive.

     

    Try using the computer without the external hard drives & USB hub. If the issue stops; then you know it has some thing to do with one of the external hard drives.

  • MCS2010 Level 1 Level 1 (0 points)
    Currently Being Moderated
    Feb 13, 2014 12:42 AM (in response to Jsh1971)

    Curious if your lockup got resolved or not as I am having the exact same issues. Mine is also a late 2009 27" and I am about ready to trash it and get a new model. I had to pay a tech to fix it only a couple mos. back with the same problem. The issue then was deemed bad RAM which had to be removed. Now the problem is back again. For all that is  bad about PCs, I never had this problem.

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