Automatic Proxy Configuration Not Working On Mac

Check the current system proxy configuration.

scutil --proxy

If the current proxy situation is not displayed, then check the proxy status of different network service.

networksetup -getautoproxyurl "Wi-Fi"
networksetup -getautoproxyurl "Belkin USB-C LAN"

If only one service is set as an automatic proxy, you can set both or change service order.

1. Choose Apple menu > System Settings, then click Network in the sidebar, select a network service on the right.
2. Click the Action pop-up menu on the right, then choose Set Service Order.
3. Drag services into the order you want.
4. Click Ok.