Working just great on one of my MBP's (a 10.9.4 13" one).
I've tried hacking at least the libraries to a 10.8 device but in vain. I'd put up with even the lack of the simulator as legacy app compatibility is the most important for me, incl. Xcode 4.4.1 (
dedicated thread).
I'll tell you all if I manage to get it hacked onto my ML MBP.