I bought it on Steam anticipating the Mac release as well. I can GUARANTEE you that I will NEVER EVER buy another game from that company again, no matter who the owners are. It is the height of bad business to announce a game release for a given platform, string people along with no other announcements (and collect money through Steam and other places) based on their "buy one, get the other platform when it's released" policies and then simply SAY NOTHING as you fully know you have ZERO intent of keeping your company's word. Buying the company should have included a legal notice to finish all promised projects. I don't CARE WTF the new owners think about Macs. All they do by canceling it (and not even saying so) is incur my never-ending wroth towards the company and its authors.
People's words seems to mean NOTHING in this day and age an the only way that will change is if people stop supporting lying SOBs and their companies. Of course, the problem is most of their user base are Windows owners and they couldn't give a flying crap if a company breaks their word or not concerning us Mac people whom many consider stupid to even buy a Mac in the first place.
I honestly thought Runic Games was different. I found Blizzard's treatment of Diablo III beyond contempt making a game that is about collecting money through nickel and dime techniques in their store, etc. rather than making a first rate game (and at $60, it shouldn't cost a dime more for ANYTHING; that price is already sky high AND it has horrible must-be-online DRM in it as well so you don't even own your own copy of the game to play whenever/wherever you want. You are stuck using their servers). *BUT* for all the horribleness that is Blizzard's online DRM and money-grubbing sad-arse sequel, they at least DID release a Mac version and THAT puts them in a lesser level of the Hells than Runic Games in my book who are nothing but lying filthy thieves for taking sales based on promises they had no real intention of keeping and for not even saying so. Frack Runic. They can shove Torchlight II where the sun never shines.
The truly SAD thing is that people have already ported the game to run in a Wine wrapper that runs full speed (the game simply doesn't need much power to begin with) and so Runic Games could have simply just used a similar wrapper as Electronic Arts did with Cider and had to do almost ZERO work for at least a few hundred thousand sales. But no, fans say that's not a real port and Runic is the real deal! Yeah, sure. Do nothing, say nothing and lose customers for life. That's real smart of them.