After a year of making a bug report, there have been no updates or comments from the developer. This game is no longer maintained. Don't expect it to work in future versions of Mac OSX, or Windows (Windows 10 is supposed to be the "last" windows version, according to Microsoft, after which they will focus on maintaining the system only).
If you're buying this game because it supports Linux, don't. The audio/video codec used here is seriously bugged. The video/audio will play for a short while, pause, then play again--and I'm running this on an 4.0 Ghz 8-core system with 32G of RAM. If you're in a quest, the audio playback is based on a timer, so you'll only hear half of what the other characters were trying to say, so the game is essentially unplayable.
If it weren't for this playback bug, it probably would be a good game. It's been over a year since I reported this bug. Since then I've built a new system with all new hardware, and upgraded my OS to 14.04. The bug still exists for me-- you can expect it to also exist for you. You can also expect new bugs and compatibility issues to go unfixed that can surface with the release of new operating systems and video drivers.
I got this game for free when I bought Wasteland 2, which is a great game, and runs perfectly on Linux (in fact, it runs better in Linux than it does in Windows for me on my system).