I posted in macOS 11.6.1 thread, but my problem continues and I’m hoping this will get more visibility.
I installed macOS 11.6.1 (and Safari 15.1) on Oct 28. On that date, Time Machine stopped completing its updates, both to a Time Capsule and a dedicated external drive. Several days later, on the Time Capsule, I deleted my backup (by telling Time Machine to stop using the Time Capsule and deleting the sparsebundle file on the Time Capsule disk) and then started a new backup. Time Machine continued to fail to complete backups, until Nov 20, when it completed its one and only backup since the macOS 11.6.1 install.
If I click on the red exclamation point next to the backup target in the Time Machine pane in System Preferences, I get the following message.
Time Machine couldn’t complete the backup to [disk name]
Time Machine did not finish backing up because some files were unavailable. Backups will resume when your Mac is unlocked.
Normally I am in user account, but I did restart and login as an administrator to see if that would enable Time Machine to finish. It didn’t.
I don’t understand what files would be unavailable and I don’t understand why Time Machine thinks the Mac is locked. Any help? Anyone else have this problem with macOS 11.6.1?