<<i really doubt there is much demand for RC flight sim by apple users.>> I'm guessin your not a Mac user.

MTAKHR is right. The cost is probably about double for a company to make an RC sim for a second platform like Mac and the Mac does have a smaller market share. From my experience, the current crop of PC sims are just starting to mature into quality commercial applications, compared to programs that are developed for the general consumer markets. I'm sure that it is hard for a small niche company to develop a good quality product even for just one platform. I'm not sure you'll see one for Mac anytime soon, but I am sure there are lots of modelers who are Mac users and would purchase one if it were available. I suspect the additional market may be too small at this point to justify the effort, but that's changing with growing Mac market share, especially in the U.S.A.

I'm a Mac diehard for nearly 20 years, but finally went out and bought an eMachines just for Realflight G2 a few years ago. I have recently updated to a new Dell. I'm considering G3 or Reflex XTR and had the chance to fly both at the AMA show last month. If you have a Mac and you want a flight sim, the best thing you can do for yourself is just go out and pick up a PC and get the sim. I invested about $600 in the Dell (I had already purchased G2 + Addons), but it screams and real flight runs well on it. Your flying will improve immensely as a result and you will probably crash less often, repaying yourself for the investiment in no time. Windows XP is actually very Mac like and you would find it not to be too difficult to switch bak and forth.

I have consisitently had problems with G2 forgetting that I have expansion disks and their support site has always been marginal at best. Their copy protection is absolutely the biggest pain in the ass I have ever had with ANY application I have ever purchased. And this is the cream of the crop I would imagine. G3 looks better in some ways, but frankly the new Reflex XTR LOOKS much better on screen. I haven't decided yet...I may buy both if I can come up with the $$$.

Whatever you choose to do, Xplane is a complete waste of time by comparison to an honest to goodness RC sim, and making the decision to go to gives you an excuse to go out and buy a new computer. Keep you Mac on hand so you have something to do while your flying buddies, friends and family are tying up your sim.