Ethernet port on iMac 2013 does not connect

iMac 2013 WiFi works, but slow (25 to 40 Mbps off potential 250 + Mbps. Somedays as fast as 179 Mbps wifi, but not lately) router misplacement slows me down and very hard to change the location of the router. Ethernet cable is good. Cable used to work with the iMac, but now it does not work. Not sure if hardware problem, or if the updates of the AOS has caused. Same cable works always with older macBook and iMac. 270 Mbps with the cable connected to the MacBook. A detailed visual inspection of the port does not bent pins. New looks.  Ports of the router has changed. Changing cables. Reset the router. You wonder if El Capitan or other updates might close port? How to re-enable?

OS X El Capitan to 10.11.5

iMac 21, 5 - uh 213

Processor Intel Core i5 at 2.7 GHz

8 GB 1600 MHz DDR3

Broadcom 57766-A1:

Name: ethernet

Type: Ethernet Controller

Bus: PCI

Vendor ID: 0x14e4

Device ID: 0 x 1686

Subsystem Vendor ID: 0x14e4

Subsystem ID: 0 x 1686

Revision ID: 0x0001

Width of the link: x 1

BSD name: en0

Kext name: AppleBCM5701Ethernet.kext

Firmware version: 57766a - v1.13, 0x010e63c4

Location: /System/Library/Extensions/IONetworkingFamily.kext/Contents/PlugIns/AppleBCM570 1Ethernet.kext

mDNS capable unloading: 68:5 b: 35:7e:f8: ff

Version: 10.2.0

In addition, Apple Support recognizes that they broke the Ethernet Ports and suggest that if we:

"Kernel Extension Configuration Data incompatible Version 3.28.1" we can fix it by going to the command line entries.  However, this version is not on my computer. I have 3.28.2 since 29/02/16 and articles 3.30.1 06/04/16 and 17/04/16.

They say on the following link:

If the Ethernet on your Mac has stopped working recently - Apple supports

If you can connect to Wi - Fi, follow these steps to update to version 3.28.2

  1. Open the activity monitor, located in the Utilities folder of the Applications folder.
  2. Select the CPU tab in the activity monitor, and then type "up-to-date" in the search field. The process of softwareupdated should now be the only listed element.
  3. Open the Terminal application, which is also in your Utilities folder.
  4. Enter this command in a Terminal to upgrade to the current version of the extension of the "Incompatible Kernel Extension Configuration Data" kernel:

    sudo softwareupdate --background

  5. Enter the admin of your OS X user account password when prompted.
  6. Switch to the activity monitor. When using the processor (CPU %) of the process softwareupdated is reset, the extension of the core must be updated.
  7. Select restart in the Apple menu to reboot your Mac.

I prefer not to do that since I could break it's worse and I 3.28.2 and beyond.

Tags: Mac

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