This entire discussion was DOA from the start. The blocker isn’t technical capability for macOS or Linux — it’s Rockstar’s DRM.
The irony? This performance-draining DRM exists to stop casual piracy of a game that’s been given away for free so many times that statistically everyone probably owns 3+ legitimate copies by now. And DRM at this level of invasiveness is a Windows-exclusive hellscape. Be grateful, honestly.
This has nothing to do with any market share or anti-cheat. Implementing later one seriously works only on server side.