this was discussed in thread Bug in DELL UltraSharp Color Calibration Solution (X-Rite) for Mac in connection with at least UP3214Q and UP2414Q
"The DELL UltraSharp Color Calibration Solution (USCCS) doesn't detect USB connected displays, It does see the connected i1 Display hardware (funnily enough in my case connected directly to the USB hub inside the monitor) but not the monitor itself, making the whole point of this type of monitor a bit moot (ignoring 4K for a moment)."
The solution was:
Did you test the 1.5.7 apple version?
http://pages.suddenlink.net/downloaddell/DUCCS_mac_157141118.zip
This link is dead. I can't find a way to download the 1.5.7 software. Could someone please tell me how to find this software?
