If process "trustd" is using 100% (or any large amount) of CPU...
This is usually caused by a damaged system keychain. Delete /Library/Keychains/system.keychain. Restart computer.
Note 1: This causes saved passwords, certificates, etc to be lost, so use with caution. Note 2: Optionally, open keychain first and make a note of any important passwords. Note 3: Only applies to system keychain, which should not contain your passwords.
I usually write a blog post about once a week. The latest post can be viewed here: Learning from Failure: I think there is a place for parties with views I find insane. (posted 2024-11-28 at 12:41:49). I do podcasts too!. You can listen to my latest podcast, here: OJB's Podcast 2024-08-22 Stirring Up Trouble: Let's just get every view out there and fairly debate them..
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