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Even if I connect a cable to the adaptor, it doesn't go online in the Network Preferences panel.

So no drivers are necessary, and has worked flawlessly in the past.Īll of a sudden, it would not detect the Ethernet connection at all, even though the System Information clearly shows that the "USB 10/100/1000 LAN" is connected and working. The adaptor I'm using is a standard USB to Gigabit Ethernet adaptor, using a Realtek chip. Personally, I got an issue with Step 8 (the command failed) but after Step 10 the adapter worked and still works fine!Įxpert advice needed ASAP!: Can't get Ethernet setup with USB adaptor I'm suddenly seeing a problem where my MacBook is refusing to connect to Ethernet, despite that a known working USB to Ethernet Adaptor (Realtek chip) is connected to the MacBook. Step 12: Press the + button in the bottom right and select USB 2.0 10/100M Ethernet Adapter and then click Add.ĭownload RD9700 USB Ethernet Adapter Mac Drivers ( ) Step 11: Open System Preferences and go to Network. Step 10: Now plug-in your USB Ethernet Adapter with a live ethernet cable. 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 7: Install the RD9700 driver located in the x86_64 folder and then restart your Mac again.

The zip file and extract it to your Desktop. Step 6: Your Mac should now restart back in to the normal operating mode. Step 5: Now from the top bar, click the Apple Logo and then Restart. You may be prompted for your Administrator password. Step 4: In the terminal window, you need to type the follow and then hit enter: csrutil disable. Step 3: From the top bar, select Utilities and then Terminal. You can release CMD + R once you see the Apple logo and a progress bar. Hold down CMD + R immediately after hearing the chime to boot in to Recovery Mode. As soon as your machine restarts, you’ll hear the Apple chime.

Step 2: Restart your Mac by clicking the Apple logo in the top-left corner and then Restart. In case this link disappear, the content is: Having an issue with a Generic USB Ethernet Adapter RD9700, I found this link: