Wi-Fi and Wired network load balance
I'm in a (admittedly rare) situation where I have users on Mac who need both an internal and external network. In some of these cases the wi-fi needs to take precedence over the wired network. OS X will allow a network connection to have priority over another connection in any account but you will need the Administrative account to set this up.
• Go to >System Preferences
• Choose Network
• Unlock the panel using the padlock icon in the lower left hand corner of the window with your administrative user and password.
• Go to the gear iconand choose Set Service Order
• Drag the Ethernet listing below the Wi-Fi listing and click Ok.
• Then click apply
when the Wi-Fi is off it will list under Ethernet
As soon as you turn it on and it connects to a Wi-Fi broadcast it will move in position above ethernet making it the primary network connection
Mac Pro, macOS Sierra (10.12.3), Dual Xeon 2.4, 24GB RAM