Not sure what you mean, I can download battle.net on MacOS and play every game on there, although admittedly I haven't tested them all. SC2 runs pretty flawlessly too.
There are some games not available for MacOS but they seem to be less and less common. Almost everything now is cross platform, in part thanks to Unity making cross-platform games easy.
There are some games not available for MacOS but they seem to be less and less common. Almost everything now is cross platform, in part thanks to Unity making cross-platform games easy.