Announcing Guild Wars 2 for Mac
The Mac Beta client is available immediately for all Guild Wars 2 players. It shares the same features and connects to the same live game servers as the PC client. Anyone who purchases Guild Wars 2 can now play it on both PC and Mac. All you need is an active Guild Wars 2 account to download the Mac Beta client. Source : Guild Wars 2
Released specs are
Mac OS X 10.7.X or later Intel Core i5 or better 4 GB Ram or better NVIDIA GeForce 320M, ATI Radeon HD 6630M, Intel HD 3000 or better 25 GB available HDD space Broadband Internet Connection
Transgaming is behind the port. That means they're using Cider, which is basically a branch of Wine that they added a lot of proprietary code to. In other words, it's still the Windows version of the game with the DirectX calls translated in real time to OpenGL and Core Audio. So it's kind of like being emulated, which is going to demand more hardware. It sucks, but it's a lot better than nothing.