Steam Support :: Steam and macOS 10.15 Catalina

Steam :: Steamworks Development :: Updated Requirements for New macOS Applications on Steam

Play 32-bit games on MacOS ( Run old Steam & Windows titles)

Steam dropping support for macOS High Sierra and Mojave in 2024

Intermediate Level Basic STEAM/STEM Kit - HamiltonBuhl

How to play Left 4 Dead 2 on macOS Catalina

Play old 32-bit Windows Steam games on Mac OS

Steam Pulls the Plug on macOS Mojave Support, Killing Many 32-bit Games - The Mac Observer

Steam and macOS 10.15 Catalina : r/apple

64-bit and 32-bit Mac games: The List of Games still Supported

Why MacOS Catalina Might Break Some of Your Apps, and What to Do About It