The port supports transmission speeds of up to 5 Gbit/s, and can be used for data, and audio/video output, and charging it was the first MacBook without MagSafe charging. Hope this helps.The MacBook has only two ports, a 3.5 mm headphone jack and a single, multi-purpose USB-C port it was the first Mac with USB-C. This solution got me up and running again. Running SonicWall TZ170 on both networks. This has only happened on my MBP 17" (2.16). I have about 15 MacPro's running on my office network and a couple more at home. One interesting note, I have Parallels installed and the Parallels program was able to see the Internet even though the Mac side was not (said the cable was unplugged on the mac side). It didn't take at first, but when I ran the "assist me" option, I selected the Built-In Ethernet, went through the process, and it seemed to work. I ended up restarting with the Ethernet cable plugged in > In system preferences I setup a manual connection instead of DHCP. The other computers on my home network worked fine and I tried the afore mentioned cable swap, port swap out the router and switch, Reset PRAM, went to church on Sunday, made my bed, etc. I thought it was a defective cable or switch. Strange part is that the ethernet connection at my office works fine, but not at home. It belongs to my school district and if I send it in I probably won't get it back for about 6 weeks at which time, I'm planning to retire and will have to give it up anyway. Any suggestions? I really don't want to send it in for repair. My old desktop Mac is connecting just fine and the router lights up when I move that cable to different ports so I don't think the router or the cable is the problem. I suspected the cable but I've tried four different ones and different router ports to no avail. (I usually use it on Airport at work but on Ethernet at home.) It continues to show the ethernet cable as being unplugged and the router light will not light up when the cable is in the MacBook. In Sys Pref - Network I turned off the Airport so that it would not look there. I woke it up and now it won't connect to the internet. I closed the lid on my MacBook and set it aside but left the ethernet cable plugged in. I was on internet yesterday until about 6:00 pm.
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