Q: Thunderbolt gigabit ethernet not working with 'cable unplugged' error
I have a MacBook Pro Retina 13" early 2015 model running OS X El Capitan. I just bought the Thunderbolt Ethernet gigabit adaptor and connected to my router (I have confirmed that it has 1000/100/10BASE-T Ethernet ports). When I do this and check the network connections, it gives the following:
Status: Cable Unplugged
Either the cable for Thunderbolt Ethernet is not plugged in or the device at the other end is not responding.
Configure IPv4 is 'Using DHCP' and the ports on the router are working for other devices that are plugged in. I have also following the instructions here: If the Ethernet connection on your Mac stopped working recently - Apple Support. I'm running 3.30.1 of the "Incompatible Kernel Extension Configuration Data", so this should not be an issue, but I did the software update as described in case there is a later version still; this didn't resolve the problem.
OS X El Capitan (10.11)
Posted on Aug 17, 2016 1:33 AM