But if you adopted 4K early, and you were using a Mac, you very well would have been stuck at 4K@30Hz, if OS X recognized your MST monitor at all. And there was a twist! Folks running Windows 7 and 8 in Boot Camp on the same Macs were able to run the same MST monitors in 4K@60Hz without issue. In other words, Apple’s hardware supported MST, but their software did not.