If you have encountered problems using TeamViewer after having set your MAC back to an earlier state from your Backups or having used TimeMachine to update your MAC OS, please follow the steps below.
This article applies to all TeamViewer users using macOS.
We recommend doing the following:
1. Please uninstall TeamViewer from your MAC
2. Please delete the plist file of TeamViewer from the system.
<home>\users\USERNAME\Libary\Preferences\
📌Note: TimeMachine can back up all changes that have occurred on your OS. TeamViewer will use plists for each version used. Should you have used different versions of TeamViewer in the past, the individual plists are then backed up.