My wife using TeamViewer on her Mac using Big Sur 11.1 can connect and control my Mac on High Sierra 10.13.3 with no problems.
When I try to connect to her Mac, my status goes from 'Real to Connect (Secure Connection)' to 'Connecting to Partner' and hangs on 'Connecting'. It never connects to her Mac.
Any suggestions? Is there something I can look at to ensure it is set up correctly?
Is my macOS too old to connect but good for being connected to?