Ethernet connectivity

It crosses my mind to describe the Location as another layer in Network settings that contains its own discreet list of connection modes, via interfaces, for various computers and other networked devices. You can't see certain interfaces under a given Location if you don't add them while that mode is active and available. It's genius really, but evidently some of us (me) did not understand that concept.

As I said in my original post, if you can't get your interface to be active, create a new Location and add it there.

I have not been able to Reply to any of the historical questions about this Apple hardware / software problem / bug. This ethernet connection issue seems to be common when using Apple's Thunderbolt to Ethernet adapter. Hopefully, people will be able to find this solution.

The Apple instructions here, https://support.apple.com/en-us/HT202617 , never mention the Network Location setup or how an old location may cause an issue where you cannot see an active ethernet connection.