herecomethe2000: I see. I wonder if there is a technical loophole as a wineskin "port" is its just the windows release, which they have rights too, bundled with wine, which they have a right to distribute. I have a hard time believing they can't do that, but then, such legal games are always best left to those that can play (lawyers). :) And you're right, there is a benefit to getting more publishers on board, and maintain good relations, which has always been GoG's standard practice.
As for right now, luckily as far as technical knowledge is concerned with wineskin, many times not much is actually needed. There is a user interface to help set it up. And with games that work out of the box in wine, It is as easy as running the installer. But it is always nice if GoG can put out a package.
True, if you really want to play older games on the mac there are many good options. Personally I use Crossover, but mostly because I got it dirty cheap in a bundle and got used to it.