iMac late 2012 - It doesn't start when I turn it on

Discussion in 'iMac' started by adrianovski, Mar 24, 2013.

  1. adrianovski macrumors newbie

    Joined:
    Mar 8, 2013
    #1
    Hi,
    Today, for the second time, when I turned on my iMac late 2012, the screen went white but the password and user picture didn't come up, and stayed like that.
    I had to hold the power button to restart it, and then it worked.
    Anyone know what's going on, and whether I should be concerned?
    Txs
     
  2. Kelsmom18 macrumors newbie

    Kelsmom18

    Joined:
    Dec 26, 2012
    Location:
    North Carolina
    #2
    That happened to my iMac late 2012 when I plugged in a new 3.0 USB hub. It wouldn't boot up - hung at the white screen. I shut down by hitting the start button, unplugged the USB 3.0 hub and restarted. Started up with no problem. Have you added a new peripheral or hub to your machine? :eek:
     
  3. bembol macrumors 65816

    bembol

    Joined:
    Jul 29, 2006
    #3
    I had this problem with certain USB accessories when I had on my old 24" iMac. HUB was one of them.

    When it was booting up and stayed on grey screen when I unplugged the HUB and Stick it started up.

    I no longer use any of it, even the USB Stick on my new iMac. I even when out and bought a My Passport Studio for Mac to replace it.
     
  4. justperry macrumors 604

    justperry

    Joined:
    Aug 10, 2007
    Location:
    In the core of a black hole.
    #4
    If this happens again, open up console and look for the last entry before your last boot, it will tell you where it hanged, and I am pretty sure it hanged on the USB device, if you let it sit for longer it would most probably skip it but it can take a while.
     
  5. Serban Suspended

    Joined:
    Jan 8, 2013
    #5
    So we can't use any flash drive in 2012 imac? I have a 16 GB usb flash drive...
     
  6. richard13 macrumors 6502a

    Joined:
    Aug 1, 2008
    Location:
    Mill Creek, WA
    #6
    No, you can use external flash drives. But you should "eject" them when you are through instead of leaving them plugged in.
     
  7. dandrewk macrumors 6502

    Joined:
    Apr 20, 2010
    Location:
    San Rafael, California
    #7
    That happened with my mid-2010. I bought a new USB 3.0 3tb drive, and suddenly I couldn't reboot without getting the white screen of LONGGGGG boot. I just turned off the mac, unhooked the drive, turned Mac back on, and when it was done starting up I plugged the USB drive back in. Fortunately, as is the case with Macs, I didn't have to reboot often.

    It hasn't happened at all with my new 2012 (knock on wood).
     
  8. adrianovski thread starter macrumors newbie

    Joined:
    Mar 8, 2013
    #8
    Thanks guys,
    It seems to be a pretty common problem.
    I do have a Kanex 4-port 3.0 usb hub (apparently the most recommended for Macs) and I recently got a Behringer U-Phono UFO202 audio card, which is another usb, but not 3.0
    I believe it's got something to do with the audio card, but don't know whether there's anything I could do to stop it happening other than unplugging it, since I can't eject it.
     

Share This Page