I've tried the MAc version on a Mac Pro 2GHz 4-core and while it seems to work just fine it's quite slow, and also it slows the Desktop UI in Leopard down quite significantly. I think one major problem Games authors suffer with the MAc platform is they are constantly fighting the UI for comtrol of the graphics card.

Still, it's an encouraging start, it'll probably be fine for mining, trading, skill setting and group PvE combat, but I wouldn't want to venture out into deadspace with it yet - it's still a bit laggy on the mouse controls.