How to View Network Traffic in macOS and OS X
ZachUsing an application of terminal command and you're not sure if it's stuck? Want to monitor network usage from the computers on your network? There's a built-in program for that.
Navigate to Applications > Utilities > Terminal.
Enter the following command and press enter:
nettopThe nettop program supports a number of commands (usually executed by pressing a single button on your keyboard). Check them out!