How to troubleshoot macOS Big Sur 11.x DEXT driver installation issues?

ASIX USB Ethernet macOS 11.3 and above driver supports ASIX AX88179/AX88178A/AX88772C/AX88772B USB Ethernet controllers.

On macOS Big Sur 11.x, the DEXT drivers and System extensions run in user space, instead of inside the kernel’s process space. Running in user space improves system stability and makes it easier to develop, debug, and install your code.

The 3rd party DEXT drivers are system extensions and run in user space. Users MUST run ASIX USB Ethernet DEXT driver application to manually activate or deactivate ASIX USB Ethernet DEXT driver in user space mode.

While activating ASIX USB Ethernet DEXT driver, users MUST select “Open Security Preference” and manually click the lock icon in System Preferences - Security & Privacy console to allow “ASIX_USB_Device_App” driver application for normal driver installation.

*** ASIX USB Ethernet macOS 11.3 driver installation issues troubleshooting steps:
1. Check if ASIX supported dongle was plugged into correctly?
2. Check if ASIX USB Ethernet macOS 11.3 driver application was installed correctly?
3. Check if ASIX USB Ethernet macOS 11.3 driver was activated correctly?
4. Manually add ASIX USB Ethernet network interface (optional)

Please download the latest ASIX USB Ethernet macOS 11.3 and above driver from ASIX AX88179/AX88178A/AX88772C/AX88772B Drivers Download web pages (https://www.asix.com.tw/en/support/download).

Note that ASIX AX88178/AX88772/AX88772A USB Ethernet controllers are already supported by Apple “AppleUSBEthernet” native driver on macOS Big Sur 11.x.