With the release of macOS Catalina this method no longer worked and if you had the Watchtower Library already installed it would stop working when you upgraded to Catalina. The other option has been to use the open source program called Wine along with Wineskin Winery to install and run it on a Mac. While this works, it is not ideal since you have to run a virtual machine every time you want to use the library. One option is to use either VMWare Fusion or Parallels, but these require running a full copy of the Windows OS on top of the Mac OS. Since it is a Windows application it will not run natively without using some sort of Windows emulator that enables a Windows program to run on the Mac. Over the years there have been several tools and instructions on how to get the Watchtower Library to run on a Mac.
