downinit

You have a Haswell cpu which is causing the problem. You need a hack that will work with haswell cpus.

I found the answer at: http://www.macbreaker.com/2012/07/mountain-lion-virtualbox.html look for vboxmanage.... use this command: vboxmanage modifyvm "{YourVM Name}" --cpuidset 00000001 000106e5 02100800 0098e3fd bfebfbff