Applications from Mac App Store operate in a sandbox, making it more challenging to make mods work.
Steam allows us to release updates anytime we feel they are ready, the current DLC system will 'just work' there as well, and with a bit of fiddling, people should be able to use any mods that are out there already for the Windows version. We are launching the Mac edition of the game on Steam for now, and honestly we are not quite sure yet when or if we will offer it through the Mac App Store. Reaching this point means that we will be able to maintain and update all editions based on shared codebase, making the probability of American Truck Simulator appearing on all three platforms simultaneously very high.
This process took us longer than we originally anticipated, we have been hinting that the Mac version is coming for longer than we are comfortable to admit, but finally we have achieved the important milestone of supporting Windows, Linux as well as Mac. Making our game engine work on Mac was quite challenging, as the engine and game code for both ETS2 and ATS is constantly evolving. We are happy to announce the availability of Euro Truck Simulator 2 on Mac OS X via the Steam platform.
