USB ethernet isn't showing up.

So I am trying to do some things with my networks on my macbooks, but something is bothering me greatly. On my 2011 macbook pro, when I use my ethernet to USB adapter (as my ethernet port is broken), it gives me the option to use Thunderbolt bridge (which is NOT what I want), but on my 2014 macbook pro (which has the exact same OS), it instead gives the option for USB ethernet (which IS what I want). Why is USB ethernet NOT showing up on the 2011 macbook pro? I really need it to.

I have narrowed the issue down more. On my 2011 one, when I click the plus button under network in system preferences, I have the option to add USB Ethernet (which is what I want). BUT, when I click create to add it, nothing happens. The prompt goes away like nothing happened. Why am I not able to add the USB Ethernet option?

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USB Ethernet no longer shows in System - USB or on network list

Hey,
I've been using a USB Ethernet to connect my Macbook Air to the internet for around a month. A couple of days ago it stopped working, showing 'Not Connected' in the network list. I followed the standard advice of swapping out locations, didn't work becuase I couldn't add the USB Ethernet to the list. I then took the advice of removing the Automatic location, and now the only network that is listed is wifi... Nothing gets added to the list, when I try to tether over USB with my phone it doesn't get added correctly to the network list either.
I've reset my SMC and PRAM too.
In System -> USB it doesn't seem to be listed either, although it does detect something, it doesn't seem to be able to realize it is my USB ethernet.
ifconfig -a shows the following;
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
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          inet 127.0.0.1 netmask 0xff000000
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gif0: flags=8010<POINTOPOINT,MULTICAST> mtu 1280
stf0: flags=0<> mtu 1280
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
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          media: autoselect
          status: active
p2p0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 2304
          ether 02:40:f3:83:bd:3e
          media: autoselect
          status: inactive
sudo dmesg returns the following relevant stuff;
USBF:
1087.985
[0xffffff80071e6600] The IOUSBFamily is having trouble enumerating a USB device that has been plugged in. It will keep retrying. (Port 1 of Hub at 0xfd100000)
USBF:
1090.984
[0xffffff80071e6600] The IOUSBFamily was not able to enumerate a device.
USBF:
1091.826
[0xffffff80071e6600] The IOUSBFamily is having trouble enumerating a USB device that has been plugged in. It will keep retrying. (Port 1 of Hub at 0xfd100000)
USBF:
1095.224
[0xffffff80071e6600] The IOUSBFamily was not able to enumerate a device.
USBF:
1096. 49
[0xffffff80071e6600] The IOUSBFamily is having trouble enumerating a USB device that has been plugged in. It will keep retrying. (Port 1 of Hub at 0xfd100000)
USBF:
1096.882
[0xffffff80071e6600] The IOUSBFamily gave up enumerating a USB device after 10 retries. (Port 1 of Hub at 0xfd100000)
USBF:
1096.882
[0xffffff80071e6600] The IOUSBFamily was not able to enumerate a device.
Would really, really appreciate some help on this, as I am pretty new to Mac OSX.
Thanks,
Jonny

Hi Why do you need to use a PC since iOS 7 you can download updates Apps everything Over wifi I have iPhone 5 s & 2 ipads in over a year I have never connected them to My Apple pc Try a wifi update If you have problems Try a Reboot press & hold power button & menu button hold both Down until You see Apple Logo you will not last any data. Cheers Brian

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What can I migrate from my 13" MacBook (white 2007) to a new MacBook Air 13" using an ethernet cable and a USB ethernet adaptor for the MBA?

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Use Setup Assistant when your new Mac first starts up. See Using Setup Assistant on Lion (it's a bit more complete).
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Thanks!
Yu-Hsuan

Or download it directly from ASIX Electronics instead of driversworld.us.
Product family: USB 2.0 to fast Ethernet
Product name: AX88772
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...but the only way to know for sure...is to buy a 2nd USB Ethernet adapter which is a waste of money if it doesn't work
I didn't bring it up in the previous post, but since the discussion is going to continue...I would argue that getting a second USB wired ethernet adapter is a "waste of money." Why not get a router? OSX's Internet Sharing turns the Mac into a NAT device. This is the primary function of a typical home router. For about the same price as (or only a few dollars more than) the Apple USB ethernet adapter, you can get a router which will probably provide better throughput performance than Internet Sharing, especially if the machine you're sharing to is doing a heavy download, it likely slow down your machine even if you're not doing anything on the internet. (e.g.: Your Word Processing may will slow down if the other computer starts streaming Netflix.)
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Hi,
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Welcome to Apple Discussions!
There doesn't seem to be a clear-cut answer to this. If you read the reviews on the Apple site, some people have been able to make the ethernet adaptor work on some PowerPC Macs, and others can't even get it to work on a different Intel Mac. I know this isn't much help, but a perusal of these reviews might be the best resource unless someone else has actually done this with the same iBook that you have.
I assume you have tried a different ethernet cable?
Good luck!

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Hello everyone,
We have a group of 3 or 4 MBAs that are showing this same issue. Whenever we reboot we need to unplug and then replug in the ethernet adapter in order for it to connect to the network. This same problem is seen regardless of the adapter being plugged directly into the computer or through a USB hub.
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Yes, Yes and NO!
What's worse is sometimes you get full 100Meg/Full Duplex and even Bonjour services, then for no reason it connects at 10base half duplex and NO BONJOUR.
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(41492)

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FIxed my problem!
After years the problem was solved somply!
Go to System preferences
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Go to Advance
Go to Hardware
The just make the changes like in the pictures below

USB ethernet isn't showing up.

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