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User profile for user: cosmocosmo
cosmocosmo Author
User level: Level 1
8 points

Repeated sleep transition timeout

Every time I leave my iMac on sleep mode for several hours, it will end up crashing and having to restart. When I turn it on again, it shows the "You Mac restarted because of a problem" window.


The report (of which I have sent many to Apple without solution) states that

"Sleep transition timed out after 180 seconds while calling power state change callbacks."


Please help, this is a new mac and it keeps doing this. I've tried resetting NVRAM, SMC... I'm lost here.

iMac 21.5″, macOS 11.2

Posted on Apr 28, 2021 1:40 AM

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2 replies
User profile for user: Jack-19
Jack-19
User level: Level 8
45,700 points

Apr 28, 2021 1:42 AM in response to cosmocosmo

Hi there,


I believe we need to proceed with an EtreCheck report. EtreCheck is a useful app to diagnose and identify issues, both hardware and software. It is trusted by many users. Please follow the steps outlined below:


  1. Navigate to: https://etrecheck.com and get the free version of EtreCheckPro.
  2. Download it. It is a free and trusted app. It is often recommended here on Apple Support Communities. 
  3. Open EtreCheck, and before running the report, be sure to check “Allow full Drive Access” at the bottom of the EtreCheckPro window.
  4. Run the report, and put it in a post, as seen here: https://discussions.apple.com/docs/DOC-250000211. We will then examine the report for issues in your Mac.


Cheers,


Jack

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Repeated sleep transition timeout

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