Crimsonland is now available on OS X! Normal Steam features like leaderboards and achievements are naturally supported. The game also supports at least PS4 and PS3 controllers on OS X at the moment. In addition several other brands of modern controllers should work too.
In other news we're also working on the Linux version. We don't have a release date yet since we have Linux controller support to implement and one Linux sound engine to write still but we're getting there!