Download Viscosity ( Viscosity.dmg ) for Mac OS X from below :
Download OpenVPN Configuration Bundle for Viscosity
Once you have finished downloading Viscosity & OpenVPN Configuration bundle , Please Complete the installation and Run Viscosity Application.
After you Run the application, You will see new Viscosity icon at top menu bar . Click on the Viscosity icon in your menu bar and Select "Preferences..." to Import Connections.
Click the plus icon (+) button in the bottom left hand corner of the window. Select “Import Connection” from the menu that appears.
Navigate to the OpenVPN Configuration for Viscosity files, and select the Connection you would like to Import.
Click the top menu Viscosity icon. Select Connect to your preferred server & Enter your VPN Username and Password when prompted.