So here we are FOUR YEARS after the creation of this topic, and still no macintosh version of the game? You DO know that macs are very popular computers, right??? Any particular reason why you're refusing to make one for mac?
Viewing post in How to download on a Mac or iPad
Macs are popular but they make up only 3% of Steam users. As a solo developer it is hard to justify spending time on a Mac version which would have a limited audience, plus the fact that (unlike for other platforms) you can only create a Mac version using a Mac, which means I need to buy the hardware, do the porting work and then keep it synced with my Windows files for every update I release. That isn't a small amount of work I'm afraid.