The order of interfaces in the list is important. To add new network interfaces, use the plus (“+”) button at the bottom of the list. Keep in mind that after you delete an interface, it will need to be manually added back to the list. To remove unused network connections, select them in the left pane and click the minus (“-”) button. You will also be warned when exiting the preference pane if you have not yet saved your changes. Whenever you make changes to the network settings, you’ll need to click the Apply button to actually set them in action. Other ones, like Bluetooth PAN, are almost never used but still automatically generated in case they’re needed. Some other ones, like Wi-Fi, are built-in.
Some network connections, like iPhone USB, are automatically generated when you connect your iPhone to your Mac. Even if the network connection is unavailable, disconnected, or inoperable, it will still appear in the sidebar. Network options, see on the left side of the Network preference pane in System Preferences, show the available network interfaces on your computer. Pop open the Network pane found in System Preferences, and let’s explore. With some training, you can actually understand what you’re doing when you try and fix your internet connection. The Network preference pane can be a dark and foreboding place.
