VM doesn't start on Mountain Lion

[mag]

Yes, as I wrote I'm at MacBook Air 2012 so it looks to be probably related to Ivy Bridge CPUs.

[mukul]

I have Mid 2012 non Retina MBP and I have the same problem. I applied the pre-release 10.8.2 software update and VB stopped working. Nothing I try seems to help.

[devrac]

Applied the 10.8.2 public release (12c54?).. sadly the problem persists

[ssutch]

This happens to me. VirtualBox is completely bricked. Does anyone know of a workaround?

MacBook Retina - 10.8.2 - VB 4.1 and 4.2

[danquah]

Same problem here (VT-x is being used by another hypervisor.), I'm on a freshly installed retina with 10.8.2.
A lot of people are going to have problems as 10.8.2 rolls out during the next couple of days....

[ssutch]

Changed to a 32 bit instance - disabled VT-X (VT-x is required for 64 bit VMs) - now the entire system locks up upon booting the VM.

[loukingjr]

I just installed 10.8.2 and my VMs are working just fine in 4.2.0. I'm on an Mid 2011 iMac with a Quad Core i7.

[rochers]

Same issues here - 10.8.2 Retina Macbook Pro -- VirtualBox is hosed. Need a fix for this ASAP -- can't do work until this works. Really will be annoyed if I have to restore the entire machine from backup.

[jwhitley]

Working for me: VirtualBox 4.1.18 (r78361), OS X 10.8.2, Early 2011 Macbook Pro (MacbookPro8,2), Quad-core Core i7, 2.3 GHz.

[LostCrew]

Same problem. Virtualbox 4.2.0 r80737, Macbook Air 13'' 2012 version.

[jbragg]

Same problem. Virtualbox 4.2.0 r80737, Macbook Air 13'' 2012 version.

Ditto.

[qwertme]

Same problem, I have tried with 4.1.18, 4.1.22 and 4.2.0.

[jarty]

Same problem, I have tried with 4.1.18, 4.1.22 and 4.2.0.

Same. With no luck. OS X 10.8.2 (12C54) on MacBook Pro 2012 (MacBookPro9,1).

[fb63]

I get the same error after update to Mac OS 10.8.2.

With Mac OS X 10.8.1 and Virtual Box 4.2 I can work without problems. Plese fix this soon!!!!!!!!

[jcrichto]

Add me to the list, dead in the water. OSX 10.8.2 on Macbook Pro Retina. Virtualbox 4.2. Ivy Bridge issue?