Valve Says Counter-Strike 2 for macOS Not Happening, There Aren't Enough Players

Supporting macOS with any sort of complex codebase is trickier than it sounds, due to the necessity to use Metal, the notarization requirements, and various quirks in cross-compile toolchains.

Darwin != Linux

The engine supports Vulcan and DX11+. Mac doesn't, natively at least. It would take a lot of effort to support it and according to their data the userbase isn't there to justify that.