How to add your key into Tunnelblick A popular OpenVPN client for MacOSX is Tunnelblick. It can be obtained for free, Follow these basic steps to use Tunnelblick with OpenVPN Access Server: Tunnelblick here In the email that we sent you there is an attachment your username with the extension ovpn so for example: meggavpn1.ovpn, Save this file to your computer.Download the Tunnelblick disk image file (a ".dmg" file) (Link Above) Open the downloaded disk image file (which mounts the disk image). Double-click the Tunnelblick icon (it may be labelled "Tunnelblick.app") and you will be guided through the installation of the program. Once you have installed Tunnelblick, you can download and install the configuration file. After logging in to the Access Server's Client Web Server, download the .ovpn file we attach in your email and double-click it. This will launch Tunnelblick if necessary, and Tunnelblick will install and secure the configuration. Run Tunnelblick by double-clicking its icon in the Applications folder. If left running when you logout or shut down your computer, Tunnelblick will be launched automatically when you next log in or start your computer. The first time Tunnelblick is run on a given Mac, it will ask the user for the an system administrator's username and password. This is necessary because Tunnelblick must have root privileges to run, as it modifies network settings as part of connecting to the VPN.