Error message you might see in the logs:
Changing the VM state from ‘DESTROYING’ to ‘TERMINATED’
This is how I resolved it:
- Under general settings, set the Version to Mac OS (64-bit).
- Under Motherboard, set Chipset to PIIX3.
- Under Acceleration, set Paravirtualisation Interface to KVM.
Now, you will be able to boot into macOS using virtualbox.