Ethernet USB adapter does not work after update to sierra mac

Ethernet USB adapter does not work after update to mac sierra.

Please solve this problem as soon as POSSIBLE

Hello guatamshah,

If your USB to ethernet adapter does not work now that you have upgraded to Mac OS Sierra, there are a number of things we can try to get it working again.

The first thing we want to do is to reset the SMC and the NVRAM on your Mac.
Reset the management system (SCM) controller on your Mac.

https://support.Apple.com/en-us/HT201295

How to reset the NVRAM on your Mac.
https://support.Apple.com/en-us/HT204063

If the adapter is not still work after only two resets check to see if your Mac recognizes the device properly in the information system. In the Apple Menu, choose about this Mac, and then click the button 'system report... '. ». Once you have the window open system information, see the USB category on the left.
OS X: about system information and System Profiler

https://support.Apple.com/en-us/HT203001

If she does not appear in the information system, see the articles below.
macOS Sierra: If a USB device does not work

https://support.Apple.com/kb/PH25343

macOS Sierra: check your device's USB connection

https://support.Apple.com/kb/PH25567

However, if you do not see the device in system information, you may need to verify that network service appears correctly. In the Apple menu, choose system then Network preferences. You should see an entry similar to "Ethernet" on the left. If no, see the steps in the article below to add. Once add, test to see if your connection works with a disabled Wi - Fi connection.

macOS Sierra: Add a network service
https://support.Apple.com/kb/PH25279

If it does not appear in the network, please let us know what you see on the right when you select the service, and the name of the service as it appears and we can go from there!

Kind regards.

Tags: Notebooks

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