I made an account just to thank you for this @MoreCoffee 🙏 @MoreCoffee wrote: This issue can be caused by deleting an authorization plugin on macOS (in this case, TeamViewerAuthPlugin.bundle) without de-registering it first. We recommend always using the built-in uninstaller in TeamViewer (Preferences > Advanced). This makes sure that the plugin is properly de-registered before deletion. In my tests, CleanMyMac X versions prior to 4.4.5 seem to be deleting the plugin without de-registering it, so that could have caused the issue. If you use CleanMyMac X, you'll want to make sure to use the newest version. If you do not have the possibility to restore the plugin as described by @Mrsharifi, you may instead be able to delete your Mac's authorization database. Your Mac re-creates a missing database during the next startup (using some default settings that are fine for most users). Start your Mac in macOS Recovery by holding down Cmd-R until the Apple logo appears. Once your Mac has booted into macOS Recovery, you should see a window titled "macOS Utilities". To delete the authorization database, your Mac's hard disk needs to be mounted and you will need to know its name (usually something like "Macintosh HD" or "macOS"). Open Disk Utility and check the left sidebar for the name of your disk. For Macs running Catalina, look for the name that does not end in "- Data". Select the disk in the sidebar. Click "Mount" in the toolbar (if you only see "Unmount", it is already mounted and you don't need to do anything). Quit Disk Utility. You should be back at the "macOS Utilities" window. From the menu bar on top of the screen, open Utilities > Terminal. Enter the command rm "/Volumes/<your disk>/var/db/auth.db" Replace <your disk> with the name of your built-in hard disk, e.g. rm "/Volumes/Macintosh HD/var/db/auth.db" Make sure not to forget the quotes in case your disk name contains spaces. Restart your Mac.
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