What is VPN?
Imagine a scene from an action film in which a villain escapes from a crime scene along a highway in a sports car. He is chased by a police helicopter. The car enters a tunnel with several exits. The helicopter pilot does not know from which exit the car will appear, and the villain leaves the chase.
VPN – this is the tunnel connecting many roads. No one from the outside knows where the cars entering him will be. No one from the outside knows what is going on in the tunnel.
VPN allows you to bypass geographic and legal restrictions. I don’t know any super vpn for mac but I know some free vpn client for mac.

Tunnelblick, as I think, is a best free vpn for mac because it is simple and clear.