I've connected my new MacBook Pro to my Apple Thunderbolt display using the Apple Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter. The display and USB are working as expected but I'm not getting any ethernet. Ethernet is working fine with my old Thunderbolt 2 MacBook Pro. Has anyone been able to get this working?
It looks like this other post provided the hint that I needed to get this working! MacBook Sierra display ethernet needs constant re-starting
Unplugging the display and then plugging it back in fixed the problem! What a pain!
According to this the trick is:
To get the ethernet on the display working, I had to disconnect the USB-C adapter, delete (AFAIR) the Thunderbolt Bridge from the network preferences, and then reconnect the adapter.
This worked for me too, I now have Display Ethernet in the network interfaces list.