I am running TeamViewer 12.0.72647 for macOS on macOS 10.12.2.
I was successfully running TeamViewer without any problems until a few days ago when all of a sudden i) I could not initiate a connection from my one macOS to any of my Windows computers ii) I could not initiate a connection any of my Windows computers to my one macOS computer and iii) I could initiate a connection between my Window computers.
The next step was to take a look at my macOS computer setup and I noticed the following:
1. The macOS computer DOES appear in the list of "My Computers".
2. The macOS computer HOWEVER IS NOT assigned to my account (noting that I do not know how this can possibly happen). I tried to BOTH assign the macOS computer to my account as well as assign the macOS computer to grant easy access but in both instances my attempt failed.
3. Worth also noting that I de-installed and reinstalled the TeamViewer but that did not solve the problem!
Would really appreciate some help with this because my macOS is essentially useless at this point.