Vboxmanage setextradata 'Name of virtual machine' 'CustomVideoMode1' '1920x1080x32' This command will change the focus of the Command Prompt to the program folder for Virtualbox (if you installed Virtualbox somewhere different, then change the command to wherever you installed it). Then, type the following command into the Command Prompt.

You can do this by opening the Start Menu, and typing 'command prompt' into the Start Menu search bar. Next, open the Command Prompt in Windows (make sure you are logged into an Administrator account on Windows). For instance, if you want to use the 1600x900 resolution, type in '1600x900x32'. Once you've saved it, turn off the virtual machine. You can change '1920x1080x32' to whatever resolution best fits your monitor.

Multibeast 4.6.1: You will need to use Multibeast 4.6.1, our favorite Hackintosh post-installation tool, to set up the Mountain Lion virtual machine after the initial installation. While Multibeast 4.6.1 is an old version designed for Mac OS X Lion instead of Mountain Lion, in our case, it actually works better than newer versions of Multibeast. Registration is required on the tonymacx86 website to download this.'Hackboot 1' is for starting the Mountain Lion installer, while 'Hackboot' 2 is for starting Mountain Lion itself. There are three different versions of Hackboot we'll need to use two of them in this guide. To help Mountain Lion start, you'll need to use Olarila's Hackboot CD. Hackboot 1 / Hackboot 2: Even though it's called a 'bootable DVD', the Olarila version of OS X Mountain Lion still can't boot in Virtualbox by itself.

In the past, we've used the iAtkos distro for this, but iAtkos hasn't updated for Mountain Lion yet, so I used the 'OS X 10.8 Mountain Lion bootable DVD for Intel PCs', by Olarila. I won't go into details, but you can download these copies from about any bittorrent website by using a bittorrent client (it's about 4.5 GB in size). Instead, you'll have to rely on pirated 'bootable DVD' copies of Mountain Lion, also known as 'distros'.

Mountain Lion bootable DVD : Unfortunately, the standard method for installing OS X Mountain Lion on PCs (which uses a paid copy of the Mountain Lion installer) doesn't work with Virtualbox.

Virtualbox : This virtualization suite is free, and though it doesn't offer official support for Mac OS X, it works well enough.

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