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Lost Ethernet connectivity under Yosemite

Joined
Oct 2, 2018
Messages
3
Motherboard
GA-Z87X-UD4H
CPU
Intel® Core™ i7-4790k
Graphics
Intel® HD Graphics 4600
Mac
iMac
Classic Mac
Power Mac, PowerBook
I have lost my two intel Ethernet connectors - have a i217 on board of my GA-Z87X-UD4H and an intel CT desktop adaptor (82574L NIC chipset). Both have worked OK until recently, both using AppleIntelE1000e v3.1.0a kext.
I used to have IntelMausi and the native / modded 82574L kext running fine on that system and intended to go back there - that combination was superior in performance.

Now I cannot see either adaptor - they are gone. Tried fixing using kext beast and kext utility, so far no success.
What have I done wrong?

Under Mojave the i217 works fine, never got the intel CT desktop adaptor to work, I think it is not supported.
 
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