Viscosity is an OpenVPN client for Mac OS X. It costs $9 to purchase, however its ability to easily setup a VPN connection is fantastic. You can download it here. If you prefer a free client, Tunnelblick is available.
Login to the client portal and navigate to 'Your Account' > 'View Connection Details'. Click 'Download the certificates'. Be sure to note your username! (you'll need it later)
Execute the Viscosity application. A dialog box should open that looks like the above picture. Enter your OSX username and password to continue (Viscosity needs root access to setup the tunnel device!).
Select 'Preferences...' from the icon in the top dock
Tell Viscosity you'll specify the files by selecting 'Import Connection > From File...' (be sure to have the zip that you downloaded from our site unzipped!)
Navigate to the directory that contains the contents of the zip file, and select 'openvpn.conf'. Click 'Open'.
Viscosity should prompt you informing you that the configuration was imported successfully.
At the top right corner, you should see a small globe. Select it and click 'Connect openvpn'
Lastly, enter your username (the one you wrote down in step #2!) and password (the same password you use to login to the client portal)
You'll know everything went OK when the Viscosity icon at the top of your screen stops spinning. Any and all traffic will automatically flow through the tunnel! If you'd like to verify, visit GeoIPTool.com