thunderbolt ethernet not showing up in network preferences
this is happening with both my thunderbolt display and thunderbolt<->ethernet adaptor....
the ether net in the t-bolt display WAS working.... but was having probs with the ethernet adaptor while on the road, so I tried deleting the thunderbolt ethernet entry from the Network Preferences panel. Well, now when I hook up my thunderbolt Display, the option doesn't re-appear! So now I'm thinking there's something in the system that's keeping that from re-appearing in the network preference panel, and it could be the reason for both items not working.
The controller is recognized at a low level by the system - in system report I get:
Apple 57761-B0:
Name: ethernet
Type: Ethernet Controller
Bus: PCI
Slot: Thunderbolt Slot 2@11,0,0
Vendor ID: 0x14e4
Device ID: 0x16b0
Subsystem Vendor ID: 0x106b
Subsystem ID: 0x00f1
Revision ID: 0x0010
Link Width: x1
BSD name: en2
Kext name: AppleBCM5701Ethernet.kext
Firmware version: 57761-a1.48, 0x2fe676f9
Location: /System/Library/Extensions/IONetworkingFamily.kext/Contents/PlugIns/AppleB CM5701Ethernet.kext
mDNS offload capable: c8:2a:14:4f:a3:90
Version: 3.2.4b8
So it's a problem with the Network Preferences panel getting loaded, somehow. I tried re-creating the kext cache, that didn't help.
Digging around a little in the system, I see this:
cd /System/Library/Extensions/IONetworkingFamily.kext/Contents/PlugIns/
$ ls
AppleBCM5701Ethernet.kext AppleYukon2.kext
AppleIntel8254XEthernet.kext IOEthernetAVBController.kext
AppleUSBEthernet.kext Intel82574L.kext
AppleUSBGigEthernet.kext nvenet.kext
But I'm out of ideas how to get the thunderbolt ethernet option back into the Network Preference panel. help?!
MacBook Air, Mac OS X (10.7.5)