Mac client?

[Shioban]

From a technical standpoint this would require the client to be recoded into the Coca API along with transposing the entire client from DirectX > OpenGL.
It's quite a large task to do something like this, certainly not something you'd get done over a month or two, this would have to be worth the investment in time to produce.

I don't see them doing it unless there's a particularly large demand, however, as with anything if there's a large enough demand they'll consider it.

Very good description on some of the challenges of porting it over to Mac. I'm hoping that they understand that there IS value to having that support, and that the market is one worth investing in. At least that's the approach many other big titles have taken, which is why they have overcame these challenges. You could be right that the company simply doesn't have the resources to expand support for mac users, nor see the business benefits of it, which would be too bad.

I am curious to research the percentage of mac users for some of those games (WoW, Borderlands 2, BioShock...). At least then I'd have a more realistic idea of how big the market is.

http://store.steampowered.com/hwsurvey/

3.47% of the Steam Userbase uses OSX, however this isn't completely accurate as it doesn't account the number of people running wine for OSX, so the number would be every so slightly higher than this.
Ontop of the fact that not everyone does the hardware survey.

But it's good as a rough guide.