Overwatch has been released on PlayStation, Xbox, Windows, and recently Nintendo as well. It hasn’t been released on the Mac however and since we’ve come so far down its game cycle, it looks improbable for it to be released now, especially with the announcement of Overwatch 2.
Simply Download the wine Emulator. Install it and then Download Overwatch for windows. Now open the download file in the Wine program to proceed with the installation process. Enjoy playing.