Only use this article if you have installed the latest version of TeamViewer on Mac (not TeamViewer QuickSupport) and your machine is running on macOS 10.14 Mojave or higher.
macOS 10.14 Mojave
macOS 10.15 Catalina
Note: For the in-depth article on TeamViewer’s Community site, visit How to control a Mac running macOS 10.14 or higher.
Note: A good alternative to TeamViewer is TeamViewer QuickSupport which does not require installation or administrator rights.
Visit Downloading TeamViewer QuickSupport on how to do so.