The above image was sent to RockPaperShotgun by Valve on March 3.

Mac users, rejoice! Finally, you’re going to get something to play besides The Sims and Spore! No more dual-booting, either! Steam – Valve’s digital content delivery service – is coming to the Mac!

Valve’s game library (including Left 4 Dead 2, the Half-Life series, and Team Fortress 2) will be making its way onto the new platform starting this April. And they won’t just be emulated Windows versions, either.

“We looked at a variety of methods to get our games onto the Mac and in the end decided to go with native versions rather than emulation,” said John Cook, Director of Steam Development. ”The inclusion of WebKit into Steam, and of OpenGL into Source gives us a lot of flexibility in how we move these technologies forward. We are treating the Mac as a tier-1 platform so all of our future games will release simultaneously on Windows, Mac, and the Xbox 360. Updates for the Mac will be available simultaneously with the Windows updates. Furthermore, Mac and Windows players will be part of the same multiplayer universe, sharing servers, lobbies, and so forth. We fully support a heterogeneous mix of servers and clients. The first Mac Steam client will be the new generation currently in beta testing on Windows.”

Valve has also added another feature, called Steam Play. What’s it do? Well, you buy a game for Windows, and you can also play it on the Mac free of charge (perfect for multi-OS households like my own).

Portal 2 will be the first simultaneous release for both platforms.