mail library issue
Mail Library cannot be read because its format requires a newer version of macOS.
MacBook Air 13", macOS 10.15
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I attempted the 10.15.4 combo update, no luck. I stated that it could not be installed on my hard disk. My issue is that I was at 10.15.5 but had to reinstall OS. Only got to 10.15.1. Need help, am a member of the beta program. Thanks in advance.
Your Mail Library was updated for that version. It cannot be read by previous versions.
Almost all of the Library-based programs will have similar problems.
You would need to restore your Mail Library from a time before installing that version.
It's possible the Mail Library wasn't updated in .5, but somewhere between .2 and .4. If that is the case, you should be able to use it if you can update to at least that version.
Did you disable getting beta updates?
Is the .1 version you are running the beta version?
You won't be able to install anything if that is the case. You just erase the drive completely and reinstall from Internet Recovery.
I have the beta program enabled, but am unable to get past 10.15.1. Attempt to check for updates, but system states all updates are there. Will attempt to restore, but will have to go to a point prior to 10.15.5. Will see what happens.
mail library issue