This happens after updating into the MacOS Bug sur. And then trying to start the VirtualBox VMs, Tried so far and no luck with below options,

  1. Un-installed and re-installed the VirtualBox
  2. Created completely new VM and tried
  3. Re-installed Oracle_VM_VirtualBox_Extension_Pack-6.1.16

Anyone else came a cross with the same issue? any clue to resolve this would really appreciated.

This the the complete Error message

Failed to open a session for the virtual machine New Ubuntu.

The virtual machine 'New Ubuntu' has terminated unexpectedly during startup with exit code 1 (0x1).

Result Code: NS_ERROR_FAILURE (0x80004005)
Component: MachineWrap



This worked for me

sudo su
csrutil clear
  • Then uninstall (from the official uninstaller) and re-install VirtualBox
  • If prompted, go to System Preferences - Privacy - General and accept the extensions
  • Reboot
  • Thank you. It worked. – Raju Jan 9 at 13:07
  • Saved my day, great thanks. – paky Feb 1 at 2:03

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