No other details on the launch were given--the announcement was a brief two sentences--though it will presumably debut alongside the native Mac versions of Left 4 Dead, Left 4 Dead 2, Team Fortress 2, Counter-Strike, Portal and the Half-Life series originally slated to launch with the Mac client in April 2010.

Those that already own the above games via Steam PC will be able to download them free on Steam Mac. Future Valve games, like Portal 2, are slated to hit both PC and Mac simultaneously and will include both PC and Mac editions with a purchase of either.