None of the machines I have here (Win7 PC/NV 670 GTX, 5,1/NV 680 GTX/10.9.4/Win7, 6,1/Dual AMD D500/10.9.4/Win8.1) can achieve consistent 85fps in ElementalDemo on any OS. It is too graphically intensive and running at VR frame rates and resolutions would likely require some substantial content changes and/or disabling some graphical effects. As a result I don’t believe that any Mac as supplied by Apple would presently be capable of offering that level of performance.