Out of curiosity, what is the current state of Unity games running on OSX/Linux environments? I recall that you could compile with Mono for cross-platform suppo

Out of curiosity, what is the current state of Unity games running on OSX/Linux environments? I recall that you could compile with Mono for cross-platform support, but I'm curious if the recent cross-platform support of much of the .NET CLR has made it easier (or more stable, etc.).