Viscosity 1.4.2 – Graphical user interface for OpenVPN

Viscosity is an OpenVPN client for Mac, providing a rich Cocoa user interface for creating, editing, and controlling VPN connections. Viscosity provides a complete OpenVPN solution for Leopard (Mac OS X 10.5) and does not require any additional downloads or software.

With Viscosity and OpenVPN you can securely connect to your home or company network from a remote location, protect your network traffic when using public or wireless networks, access websites with country restrictions, and tunnel through restrictive firewalls and proxy servers to give your computer full Internet access.

Viscosity can connect to any VPN server running OpenVPN, including most popular free and commercial VPN providers. Viscosity allows connections to be completely configured through a GUI, without any need to know how to use the command-line or OpenVPN’s configuration file syntax. Advanced users still have full manual control over configuration options if desired.


  • Cocoa GUI
  • Connection and traffic statistics
  • Multiple simultaneous connections
  • Robust DNS Support
  • Keychain integration
  • System proxy integration
  • Deployment features designed for enterprise
  • Easy connection importing
  • Growl integration


Version 1.4.2:

  • Viscosity will now automatically switch between OpenVPN 2.2 and 2.3 as needed
  • OpenVPN version can be manually selected under Preferences>Advanced
  • Support for the Notification Center under Mac OS 10.8
  • Security: Fixes a potential privilege escalation attack caused by exploiting the behaviour of ViscosityHelper and the Python framework (CVE-2012-4284).
  • Security: ViscosityHelper hardened against privilege escalation attacks
  • Security: By default Viscosity no longer allows for potentially dangerous OpenVPN commands to be used, including up and down scripts. Viscosity’s scripting support is not affected.
  • OpenVPN 2.3 patched to restore HTTP proxy support
  • DNS stability improvements when running under Mac OS 10.7 and 10.8
  • Fixes issue exporting zipped connections under Mac OS 10.8
  • Fixes issue enabling automatic IPv6 on TAP interfaces under Mac OS 10.8
  • Fixes issue importing a connection with non-ASCII characters under Mac OS 10.8
  • Fixes issue importing some TCP based connections
  • Various bug fixes and enhancements

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