iMac sleep issue

JKoopmans · December 5, 2018, 5:58pm

I have a 2017 iMac with macos Mojave installed. (fresh install)
The imac has the energy settings set to never sleep, only to turn off the screen after 15 minutes.

Lately I have found that the iMac does in fact go to sleep once the screen turns off, and starts up again when I hit the spacebar to wake up the screen (or vnc in)

Any ideas on how this happens? And how I can force it to stay awake?
It’s driving me nuts that even though the settings say it is supposed to stay awake it still goes to sleep…

Quahog · December 5, 2018, 6:35pm

Is it possible you have “Put hard discs to sleep when possible” checked?

bowline · December 6, 2018, 1:01am

Yes, check the Energy Saver settings for HD sleep, and Power Nap.

timstringer · December 6, 2018, 1:40am

I sometimes use the Amphetamine app to keep my Mac awake for a defined period of time. It’s a very flexible app and is available on the Mac App Store for the very affordable price of FREE.

JKoopmans · December 11, 2018, 10:01am

Probably a corrupt plist file, resetting fixed it.

I reset the settings in the energy screen (unchecked and checked them again) and restarted the machine, now everything is as it should be…