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Level 1

10 points

iMac 5K spontaneously restarts after sleep

My iMac 27" Retina 5K (late 2014) (OS 10.10.1) spontaneously restarts after sleep, and displays the error message, "A graphics problem has been detected. Click Report to submit to Apple."

An Apple senior advisor ran it through various tests including OS reinstall and decided to replace the computer. The problem did not occur with the replaced iMac for about 2 weeks, but now it's doing the same problematic behavior. BTW, I haven't downloaded any new software since receiving the replaced iMac.

I see from other threads that others are getting the same "graphics problem" error message, but I haven't seen anyone else mention the concomitant spontaneously restarts after sleep. Does this behavior sound familiar to anyone else?

iMac with Retina 5K display, OS X Yosemite (10.10.1), Time Capsule, iPad2

Posted on Dec 18, 2014 2:23 PM

109 replies

turbostar

Level 4

2,941 points

Jul 10, 2015 6:55 AM in response to canadianwisdom

FYI this issue is still with OSX and the upgraded 295 GPU. Note there are no threads about this issue with the stock GPU, and I never experienced the sleep wake failure when running Windows on boot camp.

I went through 3 machines with Apple - all 295s - and all had the same issue. I moved onto a stock GPU machine, no issues at all.

It *should* be corrected in time, who knows when, though.

Praetor

Level 1

4 points

Jul 10, 2015 7:20 AM in response to turbostar

I have the problem with a stock GPU. My machine has an additional 16GB of name-brand RAM, but that's the only difference.

Still have the problem with OS X 10.10.4.

[sigh]

Jul 10, 2015 9:26 AM in response to Praetor

I replaced all of the RAM sticks and that fixed the problem for me.

TomR805

Level 1

4 points

Jul 9, 2016 1:06 PM in response to Craig ZB

I've also seen the same reboots when the computer falls asleep (iMac 5k i7) latest computer but also spontaneous. I still think it is a hardware issue that isn't being picked up by their diagnostic software because it intermittent and not something they check for.

I've been working with Apple on this for about 3 months now with a senior tech and their engineer with multiple uploads of data with nothing yet. It seems they really don't know but want to keep trying different things. Really a waste of time.

iMac 5K spontaneously restarts after sleep