Mac Won't Boot and then Shuts Down!

Discussion in 'iMac' started by MacBoy200, Aug 5, 2012.

  1. MacBoy200 macrumors newbie

    Aug 5, 2012
    Hi everyone,
    I have been having this problem for 3 weeks now.
    Pretty much, when I boot up my (desktop) iMac, it will go to the grey screen, then to the grey screen with the apple logo. Normal stuff.
    BUT then a grey loading bar appears at the bottom of the screen. It will load a tiny amount, and then the computer shuts down. This whole process takes about 3 minutes. Please help!
  2. RedCroissant Suspended

    Aug 13, 2011
    Which iMac is it? Did you recently upgrade anything..HDD or RAM? This could be caused by RAM that not properly seated. Try making sure the RAM is in there correctly and then try again.
  3. forty2j macrumors 68030


    Jul 11, 2008
    Grey Bar, when it happened to me, meant the HDD needed repair. Boot off a recovery partition or OS X CD and run the disk utility.

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