That same title will, absolutely, run better under Bootcamp. That's always best, but gaming on Macs is certainly doable, and not all that bad IF you are willing to install Bootcamp. For my own gaming (and for others) I build custom gaming rigs, usually liquid cooled. But I would never, ever, suggest gaming on them in Mac OS.
I support Macs professionally, and have since the Mid 80s! They are, in many ways, fantastic systems. Honestly, the suggestions here for Mac owners are the correct ones: Just install Bootcamp and you'll never, ever go back to gaming on native Mac titles.
