I actually have RealFlight G2 running on a Windows 98 computer. Its been setup that way for about 2+ years now, and then only thing I use it for is the Simulator. I would just as soon get rid of it if there was something available for Mac. I'm hoping that some company, perhaps a new company that isn't invested in years of Windows-only source code, or maybe a european company where *nix systems are more widely used will take on this piece of the market. There are alot of us that will appreciate it when they do! Of all the systems that I would like to use a sim on, Mac would be my first choice - the screen and graphics capabilities would be awesome!