Complex sentence: PokerTracker is officially available for Microsoft Windows based computers only; however, PokerTracker 3 can be run on the Mac OS X operating system by using a platform virtualization environment such as Boot Camp.
Split into simpler sentences: PokerTracker is officially available for Microsoft Windows based computers only. However, PokerTracker 3 can be run on the Mac OS X operating system by using a platform virtualization environment such as Boot Camp.