Use MAC adress to register server?

Hello I ma making a game, but I can only connect to unities master server, not the one I built in VS, it just doesn’t work.

so will mac address help?

Why would the MAC address help?

The Mac address is purely the way your hardware identifies itself on the local ethernet LAN. It has no other purpose.

The only way your MAC address would make any difference is if you were trying to connect over WIFI to a machine-secured connection point. In which case, if it was not authorized, you would get no networking of any kind.