I installed an upgrade to OS 14.4.1 and it appears to have caused severe performance degradation. I would like to restore the system from a backup, but I don't know the exact time of the update. I would prefer not to restore multiple versions in order to find the nearest backup with the old OS. I...

I have a column with percentages; example: 8.3% 8.3% 8.3% 25% 25% 12.5% 12.5% It should sum up to 99.99%, but Numbers produces a result of 0.75 for me, Any ideas what's going on and how to fix?

I just attempted to restore a time machine backup after the latest Sonoma upgrade severely degraded several applications. When I selected a version I wanted to restore to on the recovery screen (created on an earlier version of Sonoma), I was informed that I would need to reinstall Sonoma first b...