iMac won't reboot beyond apple logo

Discussion in 'OS X El Capitan (10.11)' started by deb42, Oct 22, 2015.

  1. deb42 macrumors newbie

    Joined:
    Oct 21, 2015
    #1
    The day after I installed El Capitan on my iMac (2010), it would not boot up beyond the apple logo. I held down command and R and did a repair disk which didn't show any problems. I then reinstalled El Capitan and everything was fine. The next day the same thing happened. And the next day. So, I've just put the computer to sleep instead of shutting it down. Is El Capitan the problem?
     
  2. mrgreeneyes macrumors 6502

    Joined:
    Oct 7, 2007
    Location:
    Orleans,Canada
    #2
    I am having the same problem.
    My 2009 MacBook Pro, is stuck at the grey Apple loading screen, with the loading bar half loaded.

    It's happened to me before, where it would be frozen, all I did was shut down my Mac, and restarted and it worked like nothing happened, but not this time.
     
  3. deb42 thread starter macrumors newbie

    Joined:
    Oct 21, 2015
    #3
    I didn't even get half a bar loaded - absolutely nothing! So, if it happened with Yosemite, maybe it has nothing to do with El Capitan?
     
  4. mrgreeneyes macrumors 6502

    Joined:
    Oct 7, 2007
    Location:
    Orleans,Canada
    #4
    It happened with Yosemite once and mountain lion once
     
  5. akwarner macrumors member

    Joined:
    Feb 26, 2006
    #5
    This issue has been traced to old kext files on some machines. The upgrade to El Capitan works fine at first but on the first reboot it gets stuck on the Apple logo and won't proceed. The solution is to remove the old kext files that are incompatible with El Capitan. Discussed at length here: https://discussions.apple.com/thread/7254082?start=0&tstart=0

    I restored backups and then re-installed the upgrade about four times before folks began to figure out what was causing the problem.

    Good luck.

    A.
     

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