Mac game developers need to enable this in Steam to avoid a 32-bit problem

If Mac game developers miss these settings, their brand new game for Apple Silicon will be listed as unplayable on anything after macOS 10.15 Catalina either. Here's how to tell Steam that your game is compatible, and where the flags are. Steam's macOS Catalina warning Valve Software's gaming storefront, Steam, is the biggest of its kind when it comes to PC and Mac gaming.