VPN for Mac For using VPN on Mac you have to install the Sophos Client Authentication Agent and the FortiClient ! For both you need to Device to connect with LAN cable inhouse! I'm not sure if the FortiClient needs the Sophos Client Authentication Agent! But for security reason we need the Sophos Endpoint Protection Software: Sophos Endpoint Protection Download zip-file from smb://vogelwarte.ch/dfs/ Teamwork/IT/SophosInstall.zip Install the Sophos Installer.app Follow this guide to enable all required permissions for Sophos: https://docs.sophos.com/central/customer/help/en-us/PeopleAndDevices/ProtectDevices/EndpointProtection/MacSecurityPermissions/index.html#grant-permissions-for-scanning-and-web-protection FortiClientVPN Installation Download the VPN client software: FortiClient Onlineinstaller / Updates . Install it - Zertifikat should be automatically installed (or not needed) You need to allow in the System Settings following entries: Switch off all Inhouse Network LAN and also WLAN "Vogelwarte" or "VoWa_public" FortiClient uninstall The problem is that the Uninstaller is only working if FortNet is not running. You have to run the MacOS in the Safe Mode Safe Mode procedure Shutdown Press Power Butten for long time till "System ..." appears Press on "HardDrive" symbol Press on Shift and then the "click"-button changes to "...start into Safe Mode..." The system starts into the safe mode Now you can run the "Uninstaller" Reboot the machine