MacOS (also known as OS X and originally Mac OS X) is a Unix operating system developed and marketed by Apple Inc. since 2001. It is the main operating system for Apple's Mac computers.
To connect to a VPN, you need to enter configuration settings in Network settings. These settings include the VPN server address (which you get from your VPN provider), account name and any authentication settings, such as a password or a certificate.
Contact your VPN service provider for information you need to enter in order to connect to their VPN.
If you have a VPN settings file that you received from your VPN service provider, you can just double-click it to set up the connection, if not, you have to enter the settings manually. To do that, do the following: