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Late 2012 27" iMac Shutdown Problems

330 Views 4 Replies Latest reply: Feb 8, 2013 9:53 AM by BDAqua RSS
Nick Stearns Calculating status...
Currently Being Moderated
Feb 5, 2013 6:17 AM

When shutting down the computer, the first time will result in the computer just sitting at grey screen and never shutting down. We have waited for 30 minutes or longer and finally have to shut down via holding the power button down. After shutting down via the power button we restart and shut it down properly and it works just fine.


Some background, we are using 5 external hard drives with this computer, 2 FW400 via Thunderbolt adaptor, 1 USB2 and 2 USB3. I had purchased a 7 port USB3 hub that routed the USB drives but have switched it back to the Belkin 7 port USB2 we had previously used, thinking that may have contributed to the problem. I thought I had narrowed the problem to the most recent 3 TB WD My Book Essential hard drive that we had purchased as it would have problems mounting. I updated the firmware for that drive in hopes that would solve the problem. When shutting down last night I discovered it wasn't.


My plan is to finish checking for new firmware for each drive but I was wondering if anyone else was experiencing this or had already overcome similar problems.


Thanks for any and all help in advance,

OS X Mountain Lion (10.8.2), 3.4 i7, 32GB RAM, 3TB Fusion Drive
  • BDAqua Level 10 Level 10 (114,705 points)
    Currently Being Moderated
    Feb 5, 2013 4:02 PM (in response to Nick Stearns)

    Hi Nick,


    Most often the cause is some USB drive, I'd test without them attached, then one at a time.


    Also, Open console in Applications>Utilities, check the system log for the date/time of the last problem  & the Startup right after that for clues.

  • BDAqua Level 10 Level 10 (114,705 points)
    Currently Being Moderated
    Feb 8, 2013 9:53 AM (in response to Nick Stearns)

    Good news, thanks for the report!


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