How do you configure an Ethernet controller in Mac OS?

To configure an Ethernet controller in macOS, go to "System Preferences" and select "Network." In the Network window, click the "+" button to add a new service, select "Ethernet" from the interface dropdown, and then click "Create." You can then configure the settings, such as using DHCP or setting a manual IP address, and finally click "Apply" to save the changes. Ensure the Ethernet cable is connected for the settings to take effect.