Installing Ethernet to USB adapter (AX88772) drivers for Mac OSX El Capitan
There are a lot of discussions in forums and articles regarding installing third-party drivers for generic USB to Ethernet adapters for Mac OSX. Other users have even reported issues with their official Apple USB to Ethernet adapters after upgrading their Mac OSX version to El Capitan. Some sites provide steps involving booting to recovery mode or modifying the files in the Extensions folder. However, setting up a generic Ethernet to USB adapter actually doesn't need much effort, even if the default Apple drivers included with Mac OS X El Capitan don't work with your product.
This article discusses a generic USB 2.0 to Ethernet adapter and a Macbook Air (2015) running Mac OSX El Capitan.
Note: Although the adapter has the Apple logo and an official model branding indicating the A1277,the adapter used in this article is actually a Taiwan-manufactured product and bought at less than USD$5.00 from a Chinese online store.
Perform the following steps to set up a generic USB 2.0 to Ethernet adapter:
1. Unplug the Ethernet adapter from the Mac's USB port if it's already connected.
2. To verify if the Ethernet to USB adapter is detected and to check the product manufacturer, launch System Information, click USB > USB 3.0 Bus.
In this example, Mac OSX detects an AX887722 USB 2.0 to Ethernet Adapter by ASIX Electronics.
2. Download the driver from the manufacturer's website.
For this example, drivers for Mac OSX El Capitan are available from http://www.asix.com.tw.
Click Support > Download > Drivers.
2. Install the driver.
For the AX88772, mount the downloaded .dmg file and double-click the .pkg file.
Note: As always, if you previously performed Mac OSX steps that didn't work for the adapter or installed incorrect drivers, undo changes or remove the driver before installing the official driver. Otherwise, the supported driver may not work.
3. After driver installation is complete, reboot the system.
4. To check Ethernet functionality, disable Wi-Fi in Mac OSX and connect the USB 2.0 to Ethernet adapter to an available USB port.
5. Connect an Ethernet cable connected to your router to the Ethernet adapter.
6. Verify Ethernet connectivity by launching System Preferences > Network.
In most cases, Mac OSX immediately creates a USB Ethernet profile and requests for a valid IP address.