Certain external network adapters, such as an OWC dock, may cause Internet connection issues on Mac devices.
The issue may appear on macOS 11.x and later releases.
To confirm that the problem is caused by a driver incompatibility:
To work around the issue:
nvram -p | grep boot-argsNote down any existing boot args after the "boot-args" tag. (By default, there are no "boot-args".)
nvram boot-args="[existing boot-args] dk.e1000=0"Replace the "existing boot-args" in the above command with the ones that you noted down earlier.