thunderbolt to gigabit adaptor
I configured an Airport Extreme to be AP to access my Macbook air as a server. The connection link is established using Thunderbolt-Gigabit LAN adaptor. I have 2 of these adaptors. One works but not the other. Are there different h/w versions?
Both are obviously authorized Apple products.
How is it that one works and not the other (as link to AP)? Both will work as LAN adaptor as usual.
MacBook Air, OS X Yosemite (10.10.4)