After a series of not-too-subtle hints, Valve finally announced this morning that they were bringing Steam and Source to the Mac.
The press release states that the gaming service, engine, and the Valve library of games (including the popular Half-Life series, Left 4 Dead 2, Team Fortress 2, and Counter-Strike) would be available next month.
In a rather exciting tidbit, Valve’s Jason Holtman announced a new feature called Steam Play, allowing users with both a Mac and PC to enjoy the game on each computer at no additional charge:
Steamworks for the Mac supports all of the Steamworks APIs, and we have added a new feature, called Steam Play, which allows customers who purchase the product for the Mac or Windows to play on the other platform free of charge. For example, Steam Play, in combination with the Steam Cloud, allows a gamer playing on their work PC to go home and pick up playing the same game at the same point on their home Mac.
Additionally, Valve announced that the recently revealed Portal 2 would be simultaneously released on the PC and the Mac, making it the first game to receive such a distinction.