Navigate to System Preferences > Security & Privacy. You can click ‘Next’ for now.Īfter reaching the end, installation will fail with the message above. You might see a prompt from macOS about not allowing unsecure system extensions. Run the VirtualBox installer just like any other installer. Go to System Preferences > Security & Privacy. This guide has been updated for macOS Mojave as well. The VirtualBox installer fails with “The installation failed” where it “encountered an error that caused the installation to fail.” I tried to install VirtualBox on macOS High Sierra, but I got an error about kernel drivers, system extensions, and kernel modules not being installed.
