Marathon Infinity 1.6.1 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. This free application works fine with Mac OS X 10.4.0 or later. The program lies within Games, more precisely Action.
The following version: 1.0 is the most frequently downloaded one by the program users. The actual developer of this free Mac application is bungie. This application's bundle is identified as org.source.bungie.marathoninfinity. Commonly, this program's installer has the following filename: marathoninfinity-20120514-.dmg.
From the developer:
Marathon Infinity takes the closed universe of the Marathon series and blows it wide open. The solo/co-op campaign, "Blood Tides of Lh'owon," is a 20-level scenario sporting new textures, weapons, and aliens. More than that, the scenario sheds a surprising new light on the story's characters and the meaning of events.
You may want to check out more software for Mac, such as Marathon Red, Marathon or Marathon Pace Calculator, which might be related to Marathon Infinity.