Toggle-Wifi will turn off your Wifi connection if a ethernet adapter is active and turn it back on if there is no active ethernet adapter. Notifiactions are realized using dataJAR/Notifier.
Toggle-Wifi will be installed as homebrew/tap. Tested on macOS 12 Monterey.
brew tap mietzen/toggle-wifi update
brew install toggle-wifi
brew services start mietzen/toggle-wifi/toggle-wifi
You can turn the Notifications On/Off via Notifications & Focus in System Preferences:
