Tunnelblick is a free, open source graphic user interface for OpenVPN on OS X and macOS. It provides easy control of OpenVPN client and/or server connections.
It comes as a ready-to-use application with all necessary binaries and drivers (including OpenVPN, easy-rsa, and tun/tap drivers). No additional installation is necessary — just add your OpenVPN configuration and encryption information.
To use Tunnelblick you need access to a VPN server: your computer is one end of the tunnel and the VPN server is the other end.
Download: Tunnelblick 3.8.1