You said you have successfully installed Sierra, what methods have you tried to get Ethernet? What WiFi card do you have installed?[/QUOTE]
I tried via TP-link TL-wn725n and installed its kext. But it sometimes work, sometimes not. After restarting PC, often it doesnt work.
I tried also via Ethernet, but I dont remmember wich kext, how way I used. Im new in mac, sorry for less information. Thanks a lot.