I am on macOS 13.0 22A380 x86_64 (Ventura) and the brand new Mail.app generally runs this course of /System/Functions/Mail.app/Contents/MacOS/Mail -MailLibraryUpgradeOnly YES which makes use of ~140% of CPU energy –
I haven’t got that many emails in my inboxes and I’ve already upgraded the Mail.app library upon first launch after upgrading to Ventura,
So why does this course of kicks off each few days? And what’s it doing precisely?


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