Ethernet doesn't work on my Macbook Pro anymore

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danepak

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#237706 14-Jun-2018 10:49

I've got an ethernet adapter (to USB), but it's stopped working, so I thought the adapter was faulty.

I went to PB Tech and bought a new one (to Thunderbolt), but it's still not working.

The network connection is definitely there, as I've tested it on a PC.

Any help is much appreciated.

gehenna

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#2036424 14-Jun-2018 10:51

Is your adapter showing up in the network pref pane?

danepak

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#2036427 14-Jun-2018 10:58

Yep, believe so (sorry, I'm a rookie).

Thunderbolt Bus:

Vendor Name: Apple Inc.

Device Name: MacBook Pro

UID: 0x0001000F028B21E0

Route String: 0

Firmware Version: 17.1

Domain UUID: B90A30CD-C9EB-FB5D-A00A-32B979DE05F3

Port:

Status: No device connected

Link Status: 0x7

Speed: Up to 20 Gb/s x1

Current Link Width: 0x1

Receptacle: 1

Link Controller Firmware Version: 0.12.0

Port:

Status: Device connected

Link Status: 0x2

Speed: Up to 10 Gb/s x1

Current Link Width: 0x1

Receptacle: 2

Link Controller Firmware Version: 0.12.0

Thunderbolt to Gigabit Ethernet Adapter:

Vendor Name: Apple Inc.

Device Name: Thunderbolt to Gigabit Ethernet Adapter

Vendor ID: 0x1

Device ID: 0x8003

Device Revision: 0x1

UID: 0x0001000207288360

Apple Serial Number: DTN7505008JDWKHB9

Route String: 3

Firmware Version: 5.5

Port (Upstream):

Status: Device connected

Link Status: 0x2

Speed: Up to 10 Gb/s x1

Port Micro Firmware Version: 0.0.8

gehenna

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#2036429 14-Jun-2018 11:02

When it's plugged in, go to System Preferences and click on Network. If it's recognised it should show up in the list on the left of the window along with your Wi-Fi and BlueTooth adapters. It'll say something like Thunderbolt Ethernet or USB Ethernet depending on the adapter. If you can see it there, click on it and in the main window you can tell it to use DHCP or enter a manual IP Address. Set that up depending on what you need and click Apply.

If you can't see the adapter in the list at all then it's not being recognised by the OS. Try an SMC Reset and then reconnect it and try again: https://support.apple.com/en-us/ht201295

If all that is still not working. Go to Users & Groups in System Preferences and add a new user account that you can use for testing. Login to that account and try to connect the adapter in there. If it's working, you have a problem with your main user profile. If it's not working, you have a Mac or MacOS problem (assuming it's happening on more than one adapter then it won't be faulty adapters).

Behodar

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#2036456 14-Jun-2018 11:46

You could also try booting into Recovery (Cmd-R at the chime) and seeing whether it's working from in there. I can't remember whether there's a browser in there but at the very least you could open Terminal and ping a couple of servers (1.1.1.1 is a convenient choice).

danepak

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#2036457 14-Jun-2018 11:48

Worked it out, thanks!

Removed it, added it again, renewed DHCP lease and voila!