Hi, for my iMac late 2013 i cannot use my ethernet port. It suddenly stopped working. Here are the things about my problem and things that i try: Wifi is working No, it is not the Apple ethernet brick problem i have 3.30.1 incompatible kernel extension Ethernet cable is working, tried with a pc. Did PRAM reset Did SMC reset Did open safe mode Did delete ports and added manually Also does not works on bootcamp windows Did install new el capitan twice, including new beta No psychical damage on port I can see ethernet info on system information Here are the symptoms just before Thunderstorm damage building tv set top box satellite also building elevators and cable modem for a short period of time i connect samsung j5 via bluetooth and transfer file for the first time. tonight i will try with new ethernet cable and a clean install. If all those doesn't seem to work, i guess there is a hardware issue. Anything that i forget to do? Any other suggestions?