Kernel Panic during sleep

Installed Ventura yesterday afternoon. 2019 iMac 21.5" 4K, 3.2GHz 6-core i7, 32GB DDR4. Every time it goes to sleep: "Your Computer Restarted Because of a Problem." ...What's up with this?

iMac 21.5″, macOS 13.0

Posted on Oct 25, 2022 9:40 AM

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Posted on Oct 25, 2022 9:42 AM

Disconnect all third party peripherals before going to sleep. About the only "safe" peripherals are keyboard and mice. If an external hard drive is connected, quit the open programs that might be using it, and dismount the external drive first before going to sleep.


Many peripherals are not familiar with Mac OS low power mode, which remains in effect until you restart the Mac.

Your Energy Saver settings of put hard drive to sleep when possible can trigger it more often.

17 replies

Oct 30, 2022 7:23 AM in response to DUG1138

I have exactly the same problem (including some random freezes while using the Mac normally)


I have a number of external devices connected to the computer (Mac mini) including a few powered mechanical drives and two external SSDs that are powered via the USB bus.

It is not an option to get rid of those peripherals at the moment. They worked fine for a number of years and over several versions of MacOs X, until the Ventura update.


To make the problem worse, every time the computer crashes and I have to manually restart it, it boots into Recovery Assistant.

I use an external GPU, and when the computer boots this way, the eGPU is excluded. All I get is a black screen.

Every time I have to connect an HDMI cable between the Mac and monitor, restart the Mac from Recovery Assistant to be able to then boot properly using the eGPU and display port cable connected to my monitor. So essentially having to restart the machine three times and connect/disconnect cables at the back.


I don't think I have to point out how this is ridiculous (everything worked fine until the update).

I wonder if, at least, there is an option to disable Recovery Assistant/Recovery Mode after a kernel panic during sleep.


Thanks in advance for any help.

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Kernel Panic during sleep

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