madins Posted August 16, 2015 Share Posted August 16, 2015 OS X: 10.10.5 NVIDIA Driver: 346.02.03f01 Machine: iMac12,2 Board-ID: Mac-942B59F58194171B The hack is actually an Intel E3-1231 V3 + Z97 chipset. The key is to set the correct board id so that it is not in the black list. UP2414Q enable DP 1.2 so it is working in MST mode. I have to boot the computer with DP 1.1, then switch to DP 1.2 after seeing the desktop. Plug HDMI cable with DP 1.2 at the same time would cause reboot occasionally, and boot with DP 1.2 only gives black screen. Now the mouse lag is also gone. The only pain at the moment is I need to manually switch between DP 1.2 and DP 1.1. Got the idea from here: http://forums.macrumors.com/threads/suddenly-its-1984-nvidia-4k-60-hz-support-is-there-apple-turned-it-off.1760435/page-5 Link to comment https://www.insanelymac.com/forum/topic/307605-up2414q-gtx970-4k60hz/ Share on other sites More sharing options...
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