I've been reading reports (http://www.anandtech.com/show/8023/apple-releases-osx-10-9-3-improved-4k-display) that the 2013 13-inch rMBP is being throttled to 4K at 30Hz over displayport in the latest 10.9.3 update. This seems unacceptable given that the hardware CAN support 4K at 60Hz in Windows over displayport 1.2. Think there is anyway to force 4K at 60Hz over displayport for the 13inch macbook pro in OS X? Maybe there is a way to trick OS X into thinking that the 13 inch is actually the 15 inch, which would get the intel driver to correctly output at the right pixel clocks? Just a thought there must be a way to do it! ---------- By force, I mean is there any way to get MST working?