Viscosity is capable of automatically importing connections from Tunnelblick, making transitioning to Viscosity as painless as possible.

The first time Viscosity is run it will check for Tunnelblick connections and ask if you'd like to import them. Click Yes to have Viscosity automatically import and setup these connections.

You can also instruct Viscosity to import connections from Tunnelblick at any time by selecting "Tunnelblick" in the "Import From" drop down in the Advanced section of the Preferences window.