[SOLVED] VBoxManage: error: Failed to create the host-only adapter

A different error could be VirtualBox “Kernel driver not installed (rc=-1908)” Error on macOS.

After cloning old machine into new Macbook Pro when I tried to start my VirtualBox and I run into fallowing error.

Solution: unblock VirtualBox in Security & Privacy:

Security & Provacy

Click ‘Allow’ to unblock Oracle America (VB)

If you cannot see “Allow” button you would have to run following command:

sudo /Library/Application\ Support/VirtualBox/LaunchDaemons/VirtualBoxStartup.sh restart

Results after running the command

Once you run the command open Security & Privacy again and you will see the “Allow” button. Once you clicked “Allow” button run follow above mentioned command again, this time it should be executed successfully:

sudo /Library/Application\ Support/VirtualBox/LaunchDaemons/VirtualBoxStartup.sh restart

You’re all set. Happy hacking!