I have a similar problem and would like the checklist as well. My RRCs work fine with both halves of my IC-706 as long as both are hard wired to my router via ethernet cables. When I try to connect my control unit to the network wirelessly, using my MAC as a bridge through "Internet Sharing", the MAC doesn't recognize the unit (I've tried both a direct ethernet cable from the RRC to the MAC ethernet connection and connections through USB and Thunderbolt with adaptors). When I try to enter the IP address of the RRC control manually, I get a message that the address is in use by another device.
Any thoughts would be appreciated!!!
Bob, K2WY