I noticed that Borderlands on the Mac App Store went down to £4.99. Before I buy it, I have a few questions. 1. The game has not had an update since 2012. Does it run on OSX 10.9? 2. My iMac is a late 2013 21.5" model with Nvidia Geforce GT 750m (1Gb GDDR5 VRAM). If the game has not been updated, how will it run on my iMac? 3. Has anyone played it on Mavericks?