![mac os high sierra vpn mac os high sierra vpn](https://tunnelblick.net/images/cHighSierra-kext-approval-2017-10-06.png)
(Tunnelblick's system extensions are signed by "Jonathan Bullard", so that's what would appear in the blocked-by-red area of the window.) See Errors Loading System Extensions for instructions. If you are using a Tun VPN, you can - and should - modify your OpenVPN configuration file so it will work without the "Tun" system extension and avoid this problem. You may have encountered a new security feature in High Sierra and higher which restricts the loading of system extensions (previously called "kexts" by Apple).
![mac os high sierra vpn mac os high sierra vpn](https://www.techonia.com/wp-content/uploads/2016/10/setup-l2tp-vpn-macos-sierra-01.jpg)
Tunnelblick was not able to load a system extension that is needed to connect.
Mac os high sierra vpn driver#
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: Tunnelblick's Tun and Tap system extensions do not load. To report an issue, please follow the instructions at Tunnelblick Issues. The following is the current status of issues that have been seen using the latest version of Tunnelblick on macOS High Sierra and macOS Mojave. You should allow Tunnelblick to automatically check for updates on the "Preferences" panel of Tunnelblick's "VPN Details" window. If you are using macOS High Sierra or Mojave, 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. Tunnelblick on macOS High Sierra and macOS Mojave