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I have a new iMac 5K. I noticed a few times that my iMac will randomly wake up with a gray progress bar on the screen. I've never seen this kind of bar on a Mac before. Please help. image is attached.
iMac with Retina 5K display, OS X El Capitan (10.11.3), null
Hi,
How new is your iMac? You may be able to get free telephone support. https://checkcoverage.apple.com/
What happens when that screen appears? Does it stay there and you have to restart?
If you can get free Apple support, I would advise that.
I have to press the power button for it to take me back to the login screen.
Do you have any non-Apple USB devices connected?
Disconnect all devices except ethernet and keyboard and start up in Safe mode -- holding down Shift key on booting. See if the problem occurs there.
iMac randomly waking up with a gray progress bar
