
Once you've done that you will need to select three items: The Cinema 4D folder, the "machines_rb_20.prf" and the "teamrender_rb_20.prf" (you need the last two even if you do not use Team Render as Cinema 4D still stores some preferences data in those files). Next, quit out of Cinema 4D from the Force Quit menu (this is a very important step as this process will not work if the application is running).

Open a Finder window and head to ~/Library/Preferences/MAXON via Finder's Go > Go to Folder command. This is from Maxon themselves: "To fix this issue all you have to do is delete the C4D preferences to restore the defaults. Hey David, I believe I have the solution for you. You don't have to do that "Setup License Server" part.
