Yes.
Mini-Display Port is like normal DisplayPort. It just doesn't hold too well due to lack of latch system. So just make sure the cable is properly inserted. It is also easy to put it on reverse. So be careful on that as it will break the port. It should need force.
If you can't can get 4K 60Hz. Check the monitor on screen menu, it might be set to be on DisplayPort 1.1, and not DisplayPort 1.2, so switch to that. Refer to your monitor manual.