Whisky is a free app that allows you to install the Game Porting Toolkit (GPTK) and WINE on your Mac.Using Whisky, GPTK, and Steam, you can play older Win32 games on your Apple Silicon Mac.To install Steam on your Mac, you need to download and run the Whisky app, set up GPTK, and make a bottle for the Windows version of Steam.Whisky and GPTK compatibility varies, but Fallout 4 has been mentioned as a recently supported game.