title: VirtualBox NS_ERROR_FAILURE (0x80004005) macOS
body: <p>I'm using macOS and installed VirtualBox.</p>
  
  <p>When I start a machine, I'm getting the following error :</p>
  
  <pre><code>Failed to open a session for the virtual machine ubuntu.
  
  The virtual machine 'ubuntu' has terminated unexpectedly during startup with exit code 1 (0x1).
  
  Result Code: NS_ERROR_FAILURE (0x80004005)
  Component: MachineWrap
  Interface: IMachine {85cd948e-a71f-4289-281e-0ca7ad48cd89}
  </code></pre>