AVID Artist Color end DaVinci Resolve 12 working fine under OS X El Capitan, I had to work a additional setup using a manual configuration for a static IP address, and the EU app 3.3.2. The settings used are:
Network/Ethernet #1
IP: 10.0.0.1
Subnet Mask: 255.255.0.0
Avid Artist Color IP: 10.0.0.2
Avid Artisti Color Subnet Mask: 255.255.0.0
*Any additional Avid Controllers add #3, 4, 5 and so on at the end of the IP Address, I hope yo had found this info useful.