Ubuntu VM on Virtualbox keeps aborting

Question

I have Virtualbox (v4.3.18) installed on my Mac X (10.10) and created a VM with Ubuntu on it (ubuntu-14.04.1-desktop-amd64.iso). After the installation was completed, it asked to reboot, and when I checked the storage settings, the iso had been automatically removed. I went ahead and install software on the VM, but walked away and came back to find it had aborted. When I try to run the VM again, I see the following messages and I am unable to get back to Ubuntu: :

The only thing I have been able to do is add the iso back in the storage settings and re-install Ubuntu to be able to use it, but always temporarily since it keeps aborting. I don't want to "try it without installing" it, I want to be able to turn it off and on whenever I want and not have to reinstall every time. Does anyone know why the VM is aborting?

Answer 1

Is the "Enable EFI" parameter checked? it is on the system/motheboard page of the VM.

I met a similar problem once and checking the box solved the problem.