I was digging through the display overrides and I noticed support for a new 5K monitor was added. I don't think this has been mentioned anywhere else yet. The override file is located at: /System/Library/Displays/Contents/Resources/Overrides/DisplayVendorID-22f0/DisplayProductID-317b.mtdd After base64 decoding the EDID and opening it up in a hex editor it's quite clear that it adds support for the HP z27q. I ordered one to replace my failing Thunderbolt Display and will update this to confirm it works (or not) when it arrives. Maybe some pictures too as I haven't seen any of this display next to the nMP.