I am plugging a USB Ethernet adapter (not Apple-brand) into my MacBook Pro (Retina, 15-inch, Late 2013). I do not see any relevant 'USB Ethernet' item listed in System Preferences > Network. Should one appear when I plug in the adapter? Should I add an item with the '+' button? When I use the '+' button, I only get a list of 'Thunderbolt Bridge', 'Thunderbolt 2', 'Thunderbolt 1', 'Bluetooth PAN', 'Wi-Fi', 'VPN', 'PPPoE', and '6 to 4'.

I do not see any option for a USB-Ethernet adapter. Is this no longer supported by Apple?

This is awesome, just plug into usb port and connect ethernet cable. No drivers to install nothing to set up, it just works. I got 20 mbps download with usb 2.0 ports. This is the max speed I am paying for. I am happy with this plug and play product. I needed this since my on board ethernet chip died!

The Apple menu > About this Mac > System Report (button) > Hardware > USB report shows that I have a product by (). As far as I understand, you can run a lot of generic ones that don't have Apple-signed drivers by disabling 'System Integrity Protection' (SIP) From: Steps to get your adapter working if you've never used the adapter before in Mac OS 10.11 El Capitan. • Uninstall the dozens of other drivers you may have installed in the process of trying to get this working.

• Unplug your USB adapter, and reboot and give yourself a clean slate. As soon as the screen goes black, hold down 'Command' and 'R' until you see a black screen with an Apple logo and a white progress bar. Let go, and wait for your computer to boot into recovery mode. • From the top bar, select 'Utilities' and then 'Terminal' • In the terminal, run csrutil disable. Eclipse shortcuts windows.

• From the top bar, select '', then 'Restart' • Once you're booted back up, download and install the drivers from the CD, kindly uploaded. • Open your terminal, and run sudo kextload /System/Library/Extensions/USBCDCEthernet.kext • Reboot. • Plug in your USB Adapter, with a live ethernet cable. • Open System Preferences, and go to the Network Pane. • Hit the + button in the bottom right, select the 'USB 2.0 10/100M Ethernet Adapter', and hit add. • You're all set! Your adapter works!

• Apologize to the people you care about for the things you've said over the past few hours. They won't understand, but they will forgive you. I presume that any driver that worked for these types of things pre-Yosemite (10.10) would work for the ones in step 7. See original page for a discussion on the security risks of using this method.

But, if you need it to, and are aware of and OK with the risks, it works. This worked for me on El Capitan (10.11) with a random off-brand adapter (can't remember the brand or if it even had one). A proper instruction for RD9700 is here This is the only manual I've found so far that has ALL necessary steps. In particular step 7 is critical (install drivers from x86_64 folder). I managed to get my noname adapter working, but the internet speed is only 5mbps although I have 100mbps connection:( Step 1: Unplug your USB adapter.

Step 2: Restart your Mac by clicking the Apple logo in the top-left corner and then Restart. As soon as your machine restarts, you’ll hear the Apple chime. Hold down CMD + R immediately after hearing the chime to boot in to Recovery Mode. You can release CMD + R once you see the Apple logo and a progress bar. Step 3: From the top bar, select Utilities and then Terminal. Step 4: In the terminal window, you need to type the follow and then hit enter: csrutil disable. You may be prompted for your Administrator password.

Step 5: Now from the top bar, click the Apple Logo and then Restart. Step 6: Your Mac should now restart back in to the normal operating mode. It’s time to install the drivers. Click here to download the zip file and extract it to your Desktop.

Step 7: Install the RD9700 driver located in the x86_64 folder and then restart your Mac again. Step 8: Once your Mac has rebooted, open Terminal and enter the following then press the Enter key: sudo kextload /System/Library/Extensions/USBCDEthernet.kext. Step 9: Reboot again. Step 10: Now plug-in your USB Ethernet Adapter with a live ethernet cable. Open System Preferences and go to Network. Step 11: Press the + button in the bottom right and select USB 2.0 10/100M Ethernet Adapter and then click Add. Step 12: Disconnect from WiFi and you should notice your network connect still works through the RD9700 Ethernet Adapter.