Usually I waste a developer's time asking if they're using any PC-specific libraries in their code; your website is kind enough to acknowledge external libraries. I don't know whether the libraries you're using are precompiled or platform specific; you do. As far as porting Windows apps to OS X is concerned, the trend seems to be that since OS X = UNIX it's less of a jump than OS 9 was. Not being a professional programmer I'm not qualified to make that statement as fact.