Titles such as Left 4 Dead 2, Team Fortress 2, Counter-Strike, Portal, and the Half-Life series – will become available on the Mac in April. Wow, Mac users playing Counter-Strike, it boggles the mind.
Portal 2 will be Valve's first simultaneous release on the Windows and Mac platform, Josh Weier, Portal 2 Project Lead commented:
“Checking in code produces a PC build and Mac build at the same time, automatically, so the two platforms are perfectly in lock-step."
“We’re always playing a native version on the Mac right alongside the PC. This makes it very easy for us and for anyone using Source to do game development for the Mac.”