I run this XServe headless. I also have VirtualBox on it. To start a VM via ssh I need to first use VNC and login to the account that has permissions for VB. Then either via the Terminal application ...

If you see VERR_NEM_VM_CREATE_FAILED error and VirtualBox fails to start, follow the solutions mentioned below to resolve the issue. Reboot the host computer and ...

If you find yourself with a mismatched VirtualBox and VirtualBox Extension Pack release, such that VirtualBox itself cannot resolve, Jack Wallen shows you how to fix this from the command line.