I just recently downloaded the Mac version and I really think is a great program.
The stats you can look up really can help you plug the leaks in your game.
I am going to purchase the program once the demo is over.
Chiming in with my experience, I just installed it on my mac, and it seems to run great! There was a bit of a hiccup with getting PostgreSQL installed, but a few reboots seemed to clear it all up. Good luck, and have fun!