If VirtualBox stuck on Saving state, your machine is in the hung state. Kill the VM via the Command Prompt, disable Core Isolation/Memory Integrity, etc.
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 ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results