Q: I own TF2 on the PC. Do I have to buy it again on the Mac?
A: No. If you own TF2 on the PC, you own TF2 on the Mac (and vice versa). You don't have to buy the game twice. In addition, the Steam Cloud will automatically propagate your configuration settings and custom sprays to your Mac for you.

Q: Is it just some crappy emulated version of TF2?
A: No! Also: How dare you! Mac users aren't getting a crappy emulated version of the game. TF2 will run natively on OSX, like an actual big boy game for adults.

Q: Hmm, that all sounds pretty good. But I'll bet I can't play with my friends who own Macs if I'm on my PC.
A: Mac and PC users will all play together, on the same servers. We're not creating two separate universes. We're all going to be one big, happy family with guns locked in a bloody, never-ending struggle for cap points.

Steam and Valve's library of games including Left 4 Dead 2, Team Fortress 2, Counter-Strike, Portal, and the Half-Life series will be available in April.

"As we transition from entertainment as a product to entertainment as a service, customers and developers need open, high-quality Internet clients," said Gabe Newell, President of Valve. "The Mac is a great platform for entertainment services."