Overview

After installing Kerio Control VPN Client on Mac, a message appears that the "Kerio Control VPN Client service is not running"

The VPN client Error log generates the following entries:

  vpncore: Unable to initialize vpn core: unable to open VPN driver

  vpnMain: Unable to open VPN driver: Unknown error

  VpnFSM: Failed to initialize VPN driver (99).

Diagnosis

As Apple is constantly implementing new security features to protect macOS users, the Kerio VPN driver is not being correctly recognized as trusted software. The Security settings in mac are blocking Kerio VPN client.

Solution

1. Allow Kerio software developers under Preferences -> Security & Privacy -> General tab.
   
2. If you are still experiencing issues, launch terminal and execute the following commands:
   cd /Library/LaunchDaemons
sudo launchctl load com.kerio.kvpncsvc.plist
   
   Note: you will be prompted to enter your password.
3. (Optional) Try installing different versions of Kerio VPN client:
   
   1. 9.3.5 Beta 2
   2. 9.2.1

Confirmation

The Kerio Control VPN client connected successfully.