Ethernet port does not

We have 2 iMac and today ports Ethernet on every one of them stopped working.  The cable into each of them works (tested with a Macbook Pro) and I still can not work for every iMac with a USB Ethernet adapter ethernet cable.  How diagnose or reset these Ethernet ports and get them working again?

Tim

It's weird, we have the same problem, I have mac pro El capitan end 2013. The two Ethernet is no longer detected but seeing liaison is present... It was fine last night and after starting this morning, it does not work

Tags: Mac OS & System Software

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