I'm not paying anything extra to use Mac vs. Windows on my office license... or Visual Studio either.
In regards to games on Steam, you don't pay anything extra to play on Windows/Linux/Mac if the game has support for that platform -- haven't since it became a thing almost a decade ago.
In regards to games on Steam, you don't pay anything extra to play on Windows/Linux/Mac if the game has support for that platform -- haven't since it became a thing almost a decade ago.