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

I had the same problem today. The reason was that I had another VM running in VirtualBox. Solution: Open VirtualBox and shut down every VM running Go to System Preferences > Security & Privacy Then hit the “Allow” button to let Oracle (VirtualBox) load. Restart VirtualBox sudo “/Library/Application Support/VirtualBox/LaunchDaemons/VirtualBoxStartup.sh” restart You should now be able … Read more