I have a 12 inch MacBook Pro Retina. I run OSX El Capitan. My Thunderbolt to GB Ethernet Connection has simply stopped working. I suspect it is the upgrade to new OSX.
I have used the same connection on my girlfriends MacBook Air running Yosemite and it works perfectly.
Any bright ideas?
MacBook Pro (Retina, 13-inch, Late 2013), OS X El Capitan (10.11.3)