I don't want to ruffle too many feathers, but.... here it goes anyway.
Personally, I think you guys are being a tiny bit too demanding. For myself, I much prefer OS X for the Mac - but I understand computer game economics. No adventure game company, especially not a brand new start-up, is going to spend the energy making a game that works on Linux or OS X, when 90% of the world uses a Microsoft OS. So, I own two computers. My Mac for all my basic needs - and my PC for games. My spending an extra $1000 bucks or so is a much easier way to ensure I can play all games that come out rather than demanding that my favorite games all be ported to other Operating Systems.
If Telltale had come out with their first game made for Linux or OS X, then it would have been a sure sign they were going in the tank. Bottom line - until someone can dethrown Bill Gates, the world runs on Windows, and Telltale must abide if they are going to survive.
Just one man's opinion.