![]() ![]() Once adding it, test to see if your connection works with Wi-Fi disabled. If not, see follow the steps in the article below to add it. You should see an entry similar to "Ethernet" on the left. From the Apple menu choose System Preferences then Network. ![]() However, if you do see the device in System Information, you may need to verify that the network service appears correctly. macOS Sierra: Check your device’s USB connection MacOS Sierra: If a USB device isn’t working If it doesn't appear in System Information, see the articles linked below. Note: en0 is the name of wireless interface. And then test to see if Ethernet is now working. Then enter the following command and hit enter: sudo ifconfig en0 up. Enter the following command and press enter: sudo ifconfig en0 down. ![]() OS X: About System Information and System Profiler Here is how: Open Terminal (Applications > Utilities). Once you have the System Information window open, check the USB category on the left. From the Apple Menu select About This Mac, then click the "System Report." button. If the adapter still isn't functioning after both resets check to see if your Mac recognizes the device correctly in System Information. Reset the System Management Controller (SMC) on your Mac The first thing we'll want to do is to reset your Mac's SMC and NVRAM. If your USB to ethernet adapter isn't working now that you've upgraded to macOS Sierra, there are a number of things that we can try in order to get it working again. ![]()
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