Before discussing the license key, it is important to understand what sets Viscosity apart from the built-in VPN support in macOS or other free clients.
Viscosity is a popular OpenVPN client for macOS developed by SparkLabs. It requires a license key for continued use after an initial trial period. Licensing Model Viscosity operates on a one-time purchase model rather than a recurring subscription. Typically around $9.00 to $14.00 USD per license. Trial Period: A fully functional 30-day free trial viscosity license key mac