You can make a difference in the Apple Support Community!
When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.
When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.
I have noticed since the update to 10.15.3 that my iMac now will randomly shut down about ten minutes (give or take) after waking up from sleep. Has anyone else encountered this problem? Is there an easy fix for the issue? I don't necessarily want to reset my SMC just yet, but if that is the answer, I will of course do so. Thanks in advance for any help!
iMac 27" 5K, macOS 10.15
Do the following as needed:
1 - log into another user account and see if the problem persists there. (This tells us if the problem is limited to your user account or is system wide). If it still persists boot into Safe Mode (Use Safe Mode to isoloate issues with your Mac and Playing Safe: what does Safe Mode do?) and test there. Reboot normally and test again.
NOTE: Safe Mode boot can take up to 10 minutes as it's doing some system cache cleaning, volume verifying and directory repairing.
2 - Reset the SMC
3 - Reset NVRAM
Do the following as needed:
1 - log into another user account and see if the problem persists there. (This tells us if the problem is limited to your user account or is system wide). If it still persists boot into Safe Mode (Use Safe Mode to isoloate issues with your Mac and Playing Safe: what does Safe Mode do?) and test there. Reboot normally and test again.
NOTE: Safe Mode boot can take up to 10 minutes as it's doing some system cache cleaning, volume verifying and directory repairing.
2 - Reset the SMC
3 - Reset NVRAM
At this point, I would suggest that you run an EtreCheck report, and optionally, post it here if you need assistance with interpreting the results.
Ref: Using EtreCheck to Troubleshoot Potential… - Apple Community
Resetting the SMC is simple to do and takes less than 5 minutes, please do it 3x with all external peripherals disconnected to see if that solves the issues.
You can also reset the NVRAM and restart in Safe Mode.
Good suggestion on etrecheck.
Have you blown the dust out of the intakes lately?
What temperatures does this App report?
This App can be used to speed up the fans, all my iMacs would be dead without it.
Never ever ever drop fan speeds below the speed that the Mac itself is calling for.
MacFansControl…
Hello, everyone, and thanks so much for the prompt replies! (Indeed, I apologize that I am only responding today.)
It's funny, BDAqua: I actually dusted my iMac about a week ago, and that's also around when this issue started! I would prefer not to run EtreCheck, but I do use smcFanControl, and it generally reports that my CPU operates at around 126°F and at approximately 1200rpm for the fan speed. Is MacFansControl that much better? It is also, curiously enough, funny that right after the update, my fan actually got audibly louder, so much so that my wife noticed it!
Besides checking for any further responses, I am going to wait to see if the problem occurs again today -- I'm in the middle of a Time Machine backup now -- and then I will try resetting the SMC and the NVRAM too.
Again, everyone, thanks kindly! I will report back presently, LOL.
Thanks, BDAqua! Also, while I haven't had occasion to have the iMac asleep for an extended period of time like I did when I noticed the sudden, random shutdown issue, so far, it seems like resetting the SMC did the trick. If I have any further insight or problems, I will check back in...but so far, so good! Thanks, everyone.
smcFanControl should be OK.
iMac shuts down about ten minutes after waking up from sleep
