Deep Silver and 4A Games today confirmed that a dedicated Mac version of Metro: Last Light will be released 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.