Back in the day, our squadron (SBM: Nash, Scoob, Hedgehog, Storm, etc.) were all Macs.
Used to be a phenomenal pain in the bellybutton trying to fly head to head with Graphsim F-18.
One by one, we all jumped over to PC. I can't speak for the rest of the guys, but the reason to go to PC wasn't software. It was hardware. To upgrade a Mac, usually meant buying a new one. Even with the old 133mhz PC, you could make great gains in performance just by upgrading a video card or adding RAM or even changing out the processor. Try changing your processor on a Mac. Can you do that yet?