Imac 27" 2.9 GHz Intel Core i5 white screen on waking from sleep

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Level 1

49 points

Imac 27" 2.9 GHz Intel Core i5 white screen on waking from sleep

This has happened about three times now. I bought the latest iMac in December 2012 and have had no trouble except this occasional abberant behavior: Upon waking from sleep, a white screen appears with a progress bar that loads all the way to the last bar and then stops. The computer is no longer responsive to the track pad, mouse or any key on the keyboard. I must shut down the machine and then reboot and things are okay. Nevertheless, it is a nuisance at most and I would like to know why this is happening

iMac (21.5-inch, Late 2012), OS X Mountain Lion (10.8.3), White screen on waking from sleep

Posted on May 20, 2013 11:54 AM

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Answer 1

griff w

Level 4

3,622 points

May 22, 2013 11:31 AM in response to Tom Smith3

Hi Tom

It looks like this is expected behavior for your model. Take a look at the article below for more information about Safe Sleep.

Mac computers: Progress bar appears after waking from sleep

http://support.apple.com/kb/HT1757

Hope that helps,

Griff W.

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Answer 2

Tom Smith3 Author

Level 1

49 points

May 22, 2013 3:19 PM in response to griff w

This is interesting. The only thing is that the progress bar never gets to the end and the computer never fully wakes from sleep. It just sits there with the last bar grayed out. I have waited up tp 15 minutes for it to continue, but get frustrated and just restart. In any case your reply and the article helped me understand this behavior. I happy for the Europeans, butit does me no good. Thanks.

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