iMac 2012 freezes...

Discussion in 'iMac' started by dilgit, May 27, 2013.

  1. dilgit macrumors regular

    Joined:
    Sep 24, 2010
    #1
    My imac 2012 freezes after booting. It completes startup. I can see all apps, cursor is moving, but nothing else. Also, I have Mountain Lion 10.8.3 on an external usb 3 drive and when I boot from that HD, the system freezes all the same.
     
  2. justperry macrumors 604

    justperry

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    In the core of a black hole.
    #2
    Does it freeze after holding the Shift key instantly after login?
    This prevents login items from loading.

    Does it freeze after holding the Shift key instantly after pressing the power button? (Hold until Apple logo is visible)
    This way it will startup in safe boot.
     
  3. dilgit thread starter macrumors regular

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    Sep 24, 2010
    #3
    Safe mode did not help... Even when I boot from an external HD, the system freezes after boot, except for the mouse that floats around but clicks are not "obeyed".
     
  4. Serban Suspended

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    Jan 8, 2013
  5. justperry macrumors 604

    justperry

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    #5
    Run Apple Hardware Test, see if you get any Errors, I think you will, actually I think you won't even be able to even startup from it, I suspect hardware issues.

    Intel-based Macs: Using Apple Hardware Test

    Essentially, hold the D key at startup.

    Does Recovery HD work, hold Command-R at startup, then choose Disk Utilities from Menu, repair Disk, again, I think your problem is HW since it does the same from external source.
     
  6. dilgit thread starter macrumors regular

    Joined:
    Sep 24, 2010
    #6
    For some time everything was suddenly fine once again but now it's freezing once again. What happens is that when I boot up OK , the same in safe mode or with an external HD. The computer boots but than, when all seems fine, it freezes, the mouse cursor moves but I can not operate a single move. What else can I do/check?
     
  7. Kelsmom18 macrumors newbie

    Kelsmom18

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    Dec 26, 2012
    Location:
    North Carolina
    #7
    What brand of mouse are you using? Does the system respond to keyboard commands after booting? :confused:
     
  8. justperry macrumors 604

    justperry

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    #8
    Did you run Apple Hardware Test as suggested?
     
  9. Memorial1 macrumors newbie

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    Apr 17, 2009
    #9
    question about this Hardware test

    I also read your suggestion about doing this test. if I turn my iMAC off and then turn it on and hold the D key, do I keep holding the D key and keep holding the power button in?
     
  10. justperry, Jun 3, 2013
    Last edited: Jun 3, 2013

    justperry macrumors 604

    justperry

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    #10
    From a cold boot, press the power button, then instantly hold the D key untill the Apple Logo appears.
     
  11. Memorial1 macrumors newbie

    Joined:
    Apr 17, 2009
    #11
    do I continue to hold the power button or release it as I hold the D key?
     
  12. justperry macrumors 604

    justperry

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    #12
    It was in my last post, press and hold are different aren't they, but FYI, release the power button.
     
  13. Memorial1 macrumors newbie

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    Apr 17, 2009
    #13
    well despite following your very specific instructions, I don't get to the Hardware Test. I do have an Intel base iMac 10.6.8.

    got any other suggestions?
     
  14. 53kyle macrumors 65816

    53kyle

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    Mar 27, 2012
    Location:
    Sebastopol, CA
    #14
    I had this EXACT problem. Your hard drive is definitely dying. Whenever I would start my mac from an external drive (the hard drive had the clicking noise of doom and stopped working some time before) the mouse would move around but wouldn't click and the keyboard wouldn't respond, but after waiting for a couple of minutes it would suddenly do all of the clicking and typing that I did before. If it is like that for you, once it unfreezes, back up your stuff, bring the mac to an apple store under applecare and get the hard drive replaced free of charge.
     
  15. justperry macrumors 604

    justperry

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    #15
    It's only on the newer Macs, or with Lion/Mountain Lion.

    Read more here, you need your original disks I guess.

    Intel-based Macs: Using Apple Hardware Test
     
  16. 53kyle macrumors 65816

    53kyle

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    #16
    You need to put in the install disk 1 that came with the imac.
     
  17. justperry macrumors 604

    justperry

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    #17
    That's what I said and linked to!
     

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