So, FFXIV will be released on a Mac

[Brianmj]

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So the hardware is undoubtedly capable of running the game. The question is how are they handling the graphics system on the OS X side since it's not going to be based on DirectX. Could be OpenGL, Mantle, Metal... We just don't know at this time.

It'll be OpenGL. Mantle is still in closed beta and Windows only. Metal is IOS only.

To the OP. I have a early 2013 MBP with a GTX 650m. The game runs decent via bootcamp. There were some problems doing fights like Titan, though. Escaping Wotl was a bit of a problem due to graphical lag. But any other fight, the game ran fine.