Ethernet via Thunderbolt stopped working

Discussion in 'MacBook Pro' started by pen expers, Mar 7, 2016.

  1. pen expers macrumors newbie

    pen expers

    Oct 20, 2014
    After a system crash the ethernet adapter connected via Thunderbolt has stopped working and no longer recognizes the cable connected. Tried on both doors. WiFi works properly. What can I do?

    rMBP 15 Late 2013 running El Capitan.
  2. squarebreathing macrumors member


    Feb 16, 2016
    What happened with the system crash? Did you reformat the hard drive and install El Capitan as a fresh install? Have you tried resetting the PRAM?

    The update that was discussed seems to affect macs at random. I thought it only affected those with a dedicated ethernet port, but I've seen some say their adaptors were affected.

    I've used the ethernet dongle with thunderbolt for the past year and a half and it's always been decent, but not nearly as stable as a dedicated port. I would try the booting resets (PRAM AND SRAM), try a fresh install, and if none of those work I would contact apple and work through if the issue is the computer or the adaptor.
  3. pen expers thread starter macrumors newbie

    pen expers

    Oct 20, 2014

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