If your VPN requires the Tun system extension, you can – and should – modify your OpenVPN configuration file so the system extension will not be required. If your VPN requires a Tun or Tap system extension, you must install Tunnelblick's Tun and Tap system extensions before connecting. To report an issue, please follow the instructions at Tunnelblick Issues.
The following is the current status of issues that have been seen using Tunnelblick on macOS Big Sur. You should allow Tunnelblick to automatically check for updates on the 'Preferences' panel of Tunnelblick's 'VPN Details' window. If you are using macOS Big Sur, you should use the latest version of Tunnelblick.
Important: See The Future of Tun and Tap VPNs on macOS for information about changes to future versions of macOS.
