With that hotly-anticipated May 12th release date just around the corner, you might be wondering how Steam on Mac will perform. You're in luck, because some of our favorite Mac news sites have just finished testing the software's closed beta. The verdict? It's practically the exact same as the Windows version, except there's almost nothing to buy. Save for the Growl-like notifications at the top of the screen, the UI is all but indistinguishable, and as promised,data and purchases (if playable) automatically carry over in their entirety from your
