Unfortunately it's a major pain to make OS X 10.7 OpenGL work. Although making it work on 10.8/10.9 also introduced a couple of nasty surprises it's nowhere near the amount of pain that 10.7 can bring on us.
I guess your machine is MacPro
A couple of people already complained and then successfully upgraded to 10.9 and played the game.
The short answer for your question in near future: we need to support OS X 10.10, so this will be a priority for future OS X development. As for long term future - sadly no idea.
Guide that works -
Guide 
