kernel panic on iMac 27 2020 can't find the issue

I'm having random kernel panic, this is from yesterday

panic(cpu 1 caller 0xfffffff00b2efa08): x86 CPU CATERR detected

since I usually seen this kind of issue on PC with defective RAM modules I did run an hardware test and it says that everything is OK

Is it possible that RAM is defective but hardware test does not sport the issue?

An other "suspect" could be external SSD case that hold Time Machine

How can I sees at what time TM stated writing on disk last time?

Posted on Jul 6, 2021 3:31 AM

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2 replies

Jack-19

Level 8

46,278 points

Jul 6, 2021 3:39 AM in response to Al404

Welcome to Apple Support Communities!

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

Navigate to: https://etrecheck.com and get the free version of EtreCheckPro.
Download it. It is a free and trusted app. It is often recommended here on Apple Support Communities.
Open EtreCheck, and before running the report, be sure to check “Allow full Drive Access” at the bottom of the EtreCheckPro window.
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.

-Jack

Al404 Author

Level 1

8 points

Jul 6, 2021 10:57 AM in response to Jack-19

I was testing with this App but for Hardware sessions seems to require a Payment, is just for the GUI side or also for the report?

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kernel panic on iMac 27 2020 can't find the issue