iMac Stuck on White Start up Screen for Several Minutes

Discussion in 'iMac' started by photogpab, Apr 19, 2013.

  1. photogpab macrumors 6502

    photogpab

    Joined:
    Jun 21, 2010
    #1
    hello all - looking for some help before i make a Genius Bar appointment. When I turn my iMac on it gets stuck on the white screen that appears before the Apple logo - it stays stuck on that screen for several minutes. I've timed it at 3 or 4 minutes at this point. Finally the apple logo appears and it boots all the way through.

    This started about 2 weeks ago. at first it was only about a minute, but that was still odd. i thought it was something that would pass but its getting worse. As I mentioned above, it now stalls for several minutes.

    any help? thanks all!
     
  2. hfg macrumors 68040

    hfg

    Joined:
    Dec 1, 2006
    Location:
    Cedar Rapids, IA. USA
    #2
    If you own an older iMac, it may be that the disk drive is failing, causing multiple reads and recalibration to eventually and slowly perform the full boot.

    You might also check your SystemPreferences/StartUpDisk to verify that your disk drive is the selected boot device.
     
  3. Fishrrman macrumors G3

    Joined:
    Feb 20, 2009
    #3
    Just a thought -

    Check your "Startup Disk" preference pane, and verify that your internal drive is selected as the startup drive.
     
  4. EPiCDiNGO macrumors member

    EPiCDiNGO

    Joined:
    Sep 10, 2012
    #4
    My Macbook Pro does this when I have an external HDD connected through USB . I have to unmount the externals before I reboot my system or it takes forever to reboot even with an internal SSD as my main drive :apple:
     
  5. Imac Sam macrumors 6502

    Imac Sam

    Joined:
    Oct 9, 2011
    Location:
    Harrisonburg, Virginia
    #5
    I had the same issue. I disconnected all usb devices, and found that it was the USB data line for APC UPS.
     
  6. phisher1 macrumors newbie

    Joined:
    Jun 18, 2010
    #6
    Ha! Finally. I've read so much garbage about causes for slow booting. Turns out the problem was my USB drive that I had plugged in for Time Machine. Unplugged and I boot in seconds.

    Thanks!
     
  7. Imac Sam macrumors 6502

    Imac Sam

    Joined:
    Oct 9, 2011
    Location:
    Harrisonburg, Virginia
    #7

    No problem, glad I could help.
     

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