80+ Mail console messages per seconds: "no entry for mailbox id <X> in the cache; this should never happen"
Same problem for me and this have solved :
-
Quit Apple Mail
-
Go to folder : ~/Library/Mail/V7/MailData (you should use the Finder "Go" menu then "Go to folder" because this folder is normally hidden. ~ is your user home folder.
-
Rename all "Envelope Index xxx" on "--Envelope Index xxx". You should normally have 3 (on the screenshot I have 5 files but it's because Apple Mail was launched when I take it).
-
Launch Apple Mail
Normally, Apple Mail will re-create this files that are cached data and all could be solved.
Jérôme.
