I believe Valve is still sour from Apple discontinuing 32 bits x86 support and killing a big part of the Steam game catalog with macOS Catalina.
It's not impossible to port Portal 2 to later macOS versions, there's a port for the Nintendo Switch so it runs fine on ARM.
I believe Valve is still sour from Apple discontinuing 32 bits x86 support and killing a big part of the Steam game catalog with macOS Catalina. It's not impossible to port Portal 2 to later macOS versions, there's a port for the Nintendo Switch so it runs fine on ARM.