I'm not sure if it's automatic or not, but the alternate (Linux, etc) versions should be available when you right-click a game in your library and select Download.
I'm pretty sure it works the way you'd like, though. It'd be silly for them to release an OSX version of the client, and then try and install windows games by default.
I'm not sure if it's automatic or not, but the alternate (Linux, etc) versions should be available when you right-click a game in your library and select Download.
I'm pretty sure it works the way you'd like, though. It'd be silly for them to release an OSX version of the client, and then try and install windows games by default.