catalina mail library upgrade
How do I fix the failure of Catalina to complete the upgrade of my mail library?
iMac 21.5″, macOS 10.15
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User profile for user:
Joseph_S.
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Community Specialist
Greetings Maurizio-2,
Thanks for using the Apple Support Communities! We understand that “Mail is upgrading” fails on your Mac. Let’s take a look and see what we can do. We're happy to help!
Let's first try to restart your Mac to see if that resolves the database from failing to upgrade. Once restarted, please try to open Mail and see if the upgrade completes.
How to turn your Mac on or off
Next, try to boot the computer up in "safe mode" to see if Mail will upgrade through there.
How to use safe mode on your Mac
Lastly, we recommend checking to make sure you are on the latest version of macOS Catalina. If you are not, please make sure you backup all important information prior to updating your software.
How to update the software on your Mac
Have a great day!