We received a new Xerox Altalink C8070 at our school. We run MacOS 10.11 and the current driver from xerox is 4.14.0_1947. This driver will not find out C8070 on the network and when you use the IP instead of discovery we get this message:
"The printer model at this address is not supported by this installer. To continue, choose a supported model or enter a new IP Address or DNS Name"
When you click the select a manual printer model dropdown there is no C8070 to choose from?
That is pretty odd, but I can't replicate it at all on 10.13.X using the same driver just downloaded now. So restart the Mac and hope really, or just choose the actual model from the dropdown list provided in your screenshot.
Or install it manually from System Preferences