After I could get into system follow method 1, I found this topic in teamviewer forum, which suggests directly delete /Volume/Macintosh HD/var/db/auth.db and let macOS rebuild it.get a copy of TeamViewerAuthPlugin.bundle from anywhere like another mac, and put it to /Volume/Macintosh HD/Library/Security/SecurityAgentPlugins.I found two way resolve it, both need go into recovery mode: Only if you reboot, you can never get back. Uninstall Teamviewer on Catalina will cause the system hang on boot, reports 'Unrecoverable Error: securityagent cannot generate requested teamviewerauthplugin: start' and stuck there. I made doubly sure this is not a checksum does not match error.I have checked the instructions for reporting bugs.
