Deep Silver has confirmed that a dedicated Mac version of Metro: Last Light will arrive on September 10th, 2013 via the App Store and Steam. A Linux version is also in development, scheduled for release later in the year. Metro: Last Light on Steam will support Steam Play, meaning that owners of any Steam version will automatically find the game added to their PC, Mac and Linux Steam libraries.
Metro: Last Light for Mac and Linux will receive the same DLC packages as the PC and console versions. The Metro: Last Light Season Pass, and the Faction Pack and Tower Pack DLC will be available at launch for the Mac release, and the upcoming Developer and Chronicles Packs will release on Steam and the App Store alongside the PC and console releases.