I used to be a real mac zealot. My immediate family has owned no fewer 6 Apples and 1 Mac clone (the first computer I bought with my own money) over the years. They are great machines and they definitely have their uses. My Mac runs Linux great and is my house's fileserver. The new G4s are really slick machines too.
The truth is though, Apple is becoming ever more of a niche market, and almost all Mac games are ports of only the most popular PC games that come often come out on Mac a year or more after release on the PC side. Gaming isn't the Mac's strongpoint--despite what Steve Jobs would want you to believe. This is not to say that Apple's hardware isn't up to the task--rather the market isn't. People don't buy Macs just to game. People who are serious about gaming buy PCs.
Sure, there are Mac flight simmers, and a Mac version would bring more customers into Aces High. But is it worth the effort on HTC's part to develop for another platform for what will probably be very small returns? Of course, I speculate that it wouldn't be worth it... I could be wrong. But then why haven't they gone cross-platform sooner if they didn't think it would be worth it? It's not as simple as just throwing a Mac programmer at the code... the whole Aces High source code for Pcs would need significant reworking to be made easily cross-platform. We're not talking about porting the game once, like most Mac game ports. You've got to port it every time there is an upgrade to Aces High. Adding another platform is going to slow development on the PC side as well--meaning more time between versions. You
really want that??
As to Rip's question, no I'm not going to pay $50 extra just for a Mac version. Why would I pay extra for something that isn't benefitting me directly and I'm not going to use? As much as I like Aces High and want to see it succeed, I'm a customer of HTC. HTC is not some charity I give money to. I might bribe them for a P-47M though--that I *would* use!