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macOS Monterey takes 25+ minutes to boot

Hi, I wonder if anyone else has the same issue:


Just updated to Monterey from Big Sur - and it takes forever to boot (25+ minutes). Already happened several times.


Before I go through the regular steps for slow boot troubleshooting, I wonder if others have the same issue? And possibly a solution?


iMac 2017 27" 40 GB; 180 GB free space

iMac 27″ 5K, macOS 12.0

Posted on Oct 27, 2021 6:20 PM

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Posted on Oct 28, 2021 5:39 PM

Thanks, that's good to know.


My system is also on an external SSD drive. So it appears that Monterey has problems specifically with external drives.


Because I was testing Monterey also on my internal drive and there was no issues (the internal drive is Fusion and I don't use it for real work as it's too slow).


I submitted a bug to Apple.


As a developer I have to upgrade early. Usually there's no issues. But Apple screwed up this time with Monterey.


You mentioned "verbose mode output"... How do you activate it - I'm not familiar with this option?

138 replies

macOS Monterey takes 25+ minutes to boot

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