I'm stuck to find the reason my iMac is sometimes entering in Hibernate (or standby) mode.
Here is my configuration:
- OSX version: macOS Mojave (but I have this issue with the previous versions too),
- Model ID: iMac 14.3,
- Intel Core i5 2,9 GHz
- Boot ROM version: 220.127.116.11
- SMC version: 2.17f7
Note: I have an iMac, not a Mac book, so there no battery.
Symptoms: sometimes (once a week or every two weeks), the computer enter in hibernate mode: the screen shut down and, after around 15 seconds, the cooling fan is stopping. Once the cooling fan is stopped I can wake the computer up: the session window is displayed… I can the login and continue to work. But, often, I can only work 15 seconds and the computer enter in hibernate mode again. The 15 seconds seams to be a constant.
Sometimes, when I choose "suspend activity" in the Apple menu, and wait for a while, the problem is temporary solved. Rebooting the computer doesn't solve the problem. I also tried to unplug it without success.
↪ pmset -g System-wide power settings: Currently in use: standby 1 Sleep On Power Button 1 womp 1 halfdim 1 hibernatefile /var/vm/sleepimage powernap 1 autorestart 0 networkoversleep 0 disksleep 0 standbydelayhigh 86400 sleep 30 (sleep prevented by AddressBookSourceSync, sharingd) autopoweroffdelay 28800 hibernatemode 0 autopoweroff 1 ttyskeepawake 1 displaysleep 30 highstandbythreshold 50 standbydelaylow 86400
I really appreciate some help to solve this recurring issue.
- Time Machine was enabled (I just turn it off to see).