Remember how Steam was coming out for Mac? It happened. Right now, as long as you have a computer and don’t use Linux, you can use Steam.
The Steam application runs well, although downloads are a little slow right now, probably because a lot of people are downloading games right now. Thanks to Steam Play, there are already 57 games available for Macintosh consumption. That includes hits like Torchlight and Civilization IV.
Also, Valve’s first game on Mac, Portal, is free right now until the 24th. As far as I know, that’s for Mac and Windows gamers. Portal, as you might remember, is pretty much the best game ever. You really should get it. I’m looking at you, Colin and John. It’s free. You’ve got no excuse. Give it a shot.