If you are using macOS Catalina, see Tunnelblick on macOS Catalina.If you are using macOS Big Sur, see Tunnelblick on macOS Big Sur.If you are using an Apple Silicon Mac, see Tunnelblick and Apple Silicon.(1) Your version of macOS did not allow the system extension to load or you did not give permission for the system extension to load: There are two possible causes for this message: Tunnelblick was not able to load a system extension that is needed to connect. Tunnelblick was not able to load a device driver (kext) that is needed to connect. If you see a message similar to one of the following: If you are using a Tap VPN, Tunnelblick must load a system extension for your VPN to operate.Įrrors Messages When Loading System Extensions 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. (Note: Apple previously used the terms "kext" and "kernel extension" but now uses the term "system extension".) Tunnelblick may try to load a system extension to control the VPN tunnel. Important: See The Future of Tun and Tap VPNs on macOS for information about changes to future versions of macOS.
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