Originally Posted by TheLaughingMan
I am not sure Steam does either. I mean the Steam platform is lauched with an .exe, but the games are not stored in a "normal method". Instead of .exe files and folders, it creates icon links to directories and libraries within Steam. So, like you I am not sure, but I don't think that will be an issue.
Hey man go to this directory
C:\Program Files (x86)\Steam\steamapps\common ( assuming your on a 64bit os)
Then go into one of your game folders
Steam games function just like all other PC games, so I'm fairly sure steam will have to make separate steam client/steam games for Macs.
But as I said I've not used one in years and years and have no idea what sort of file types they can handle these days.
So could be completely wrong