Don't do it!!
This is quite possibly the worst game ever - if you are going to make a sim city game, make a sim city game, if you don't like sim city games, don't buy them. There is nothing detailed about this game, it is about as interesting as one of those fish in a tank screen savers, and despite the fact that it may look kinda good for about 30mins, after playing for 30mins it gets sooo slow.
So yeah - feel free to start a rumor about it coming to Mac, and if it does that's fine, just don't buy it.