How to determine Mac shutdown causes
Introdução
Ir para o passo 1This guide will show you how to determine why exactly your Mac shut down or restarted using macOS's built-in logging.
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Copy and paste the following command in your Terminal window:
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The previous shutdown causes in the timeframe you selected will appear as a list.
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Done! You should be able to use these codes to further troubleshoot random shutdowns or other strange events.
Hit the button below if this guide helped solve your issue :)
Done! You should be able to use these codes to further troubleshoot random shutdowns or other strange events.
Hit the button below if this guide helped solve your issue :)
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For me it says
kernel: (AppleSMC) Previous shutdown cause: -20
The attached PDF (and the internet) doesn’t seem to have any information about this code. What’s the source of the codes for the PDF? Maybe they have updated listing for shutdown codes.
we also have -20 as a cause and have no idea what it means. did you ever find it out?
I also have -20 code of shut down after macOS 10.15.5 update with MBP 16inches model.
but no information at all….
赤月小黄泉 -
writErr = -20, /*I/O System Errors*/ its this error for code -20 .. Find all error codes here :- https://krypted.com/lists/comprehensive-...
Sorry , that was not related, check this one : - https://georgegarside.com/blog/macos/shu...
and, error code 20- T2 security chip initiated shutdown
