I'm having trouble with VirtualBox within Ubuntu. I want to create a 64-bit virtual machine, but VB only gives me 32-bit options (see screenshot). I installed VirtualBox on macOS, and it works fine. However, when I installed VB within Ubuntu I got this problem.

In fact, I wanted to install gnome-software (with Virtualbox) on Ubuntu in following this YouTube tutorial, but it is not possible so far.

I have a Macbook Pro (Mid-2012, 13-inch), and Ubuntu 64-bit with installed with VirtualBox

The problem seems to be the Vt/x is disabled. I thought it was the one on the OS X. According to the Apple Support, it couldn't be modified from OS X. So we have to enable from VB.

Question : Could anyone be able to tell me how to enable virtualization from VB?

P.S. It is a bit weird, but I installed Ubuntu with VB on macOS, and now I want to install gnome-software with VB within Ubuntu.

  • 1
    Just to clarify: Host OS is OSX, hardware is Apple, and Vt/x is enabled in BIOS? Do you dual boot OSX and Ubuntu? What version and architecture of Ubuntu would that be?
    – Takkat
    Oct 17, 2016 at 8:36
  • @Takkat - Macs don't have a BIOS. Oct 17, 2016 at 14:42
  • I know, it is a UEFI or just EFI boot.
    – Law
    Oct 17, 2016 at 14:55
  • Still unclear. Do you try to set up a nested VM? This is at present only possible with software virtualization (i.e. 32-bit). See virtualbox.org/ticket/4032
    – Takkat
    Oct 17, 2016 at 16:29

1 Answer 1


Try this link https://forum.parallels.com/threads/how-to-enable-vt-aka-vtx-or-vt-x-with-refit-and-vmx-var-set-efi.3273/ It should work.

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