(For simple instructions to make such modifications, see Errors Loading System Extensions.)įor a Tap VPN, Tunnelblick's Tap system extension must be loaded because macOS does not have a built-in Tap device driver.Īpple has made it more and more difficult to load system extensions with each new version of macOS. Those configuration files should be modified so that the built-in macOS 'utun' device driver can be used. Most OpenVPN configuration files will automatically use the 'utun' driver, but some include options that require Tunnelblick to use its own Tun system extension. To connect to a VPN, Tunnelblick needs to use a special kind of device driver:įor a Tun VPN, macOS includes a built-in 'utun' device driver which can be used so that Tunnelblick's Tun system extension does not need to be loaded. Old versions of Tunnelblick will not help How to modify a Tun VPN so it will not require the Tun system extension How to tell if a VPN requires a Tun or Tap System Extension
