macOS Operating System Update Issue
On certain macOS systems, Cable Matters USB-C® or USB-A Ethernet switches, adapters, hubs, or docking stations might fail to work due to an out of date macOS operating system. The Ethernet port might not be detected and might not function. This issue affects certain Cable Matters USB Ethernet adapters with Realtek chipsets (Models 201069, 201013, 201020, 201090, 202026, 202095, 107034, and 201054).
To resolve this issue, update your macOS operating system to at least macOS 11.3.1. Open the System Preferences panel from the Apple menu, then select Software Update. Enter your macOS username and password if you are prompted to do so, then click “Upgrade Now” to begin the upgrade process.
If you are still experiencing issues with Cable Matters Ethernet adapters on macOS, you may need to reinstall the Realtek device driver. Click here to download the driver. Download the latest macOS driver available.