Even though we've just recently launched Train Titans, our train simulation/puzzle game, for iOS, we've also got an OS X version coming to the Mac App Store on the 21st. It has all the neat toys the iOS version has (various puzzle levels, evolving trains and buildings, rivers, mountains, bombs, train splitters, and even portals) but when looking at all that on a 24-inch (or larger) screen, we think it all becomes even better(er).
How much porting did you do? I've been porting something and when I put it on OSX I found I didn't like how it felt too much like the iOS version and changed up quite a bit to make it feel right.