How to Prioritize Ethernet Over Wi-Fi in macOS
If your Mac is connected to both an Ethernet cable and Wi-Fi, you probably want to use Ethernet by default since it's generally faster. This short guide will teach you how to prioritize the wired (Ethernet) connection when your Mac is connected to both Ethernet and Wi-Fi.
This approach is better than toggling Wi-Fi off when you connect your Ethernet cable since Wi-Fi is needed for things like unlocking your Mac using your Apple Watch.