I recently got a new iMac 5k late 2015 with 2Tb Fusion drive. Ever since arrival, it had sleep problems. It would go to sleep and wake without any problems except if it went into standby(after 3 hours of sleep). When waking the screen was black with some red graphics glitch on top where the menu bar is, it would go to a login screen only if i kept pressing different keys. After fiddling in the terminal I saw that in
pmset -g standby was 1, so I removed standby like so
sudo pmset -a standby 0
Now all seems ok.
My question is, do iMacs need to have
standby 0 by default and mine was activated by mistake or does it have a hardware fault that should be checked ASAP?
I checked another iMac and saw that it had
standby 0 as well. I don't know what to believe.
This is my
standby 0 Sleep On Power Button 1 womp 1 halfdim 1 hibernatefile /var/vm/sleepimage powernap 1 autorestart 0 networkoversleep 0 disksleep 1 sleep 10 (sleep prevented by Google Chrome, coreaudiod) autopoweroffdelay 28800 hibernatemode 3 autopoweroff 1 ttyskeepawake 1 displaysleep 10 standbydelay 10800
Activated hibernatemode 3 just in case power went off when it's in sleep.