You're almost there! You've installed OS X, but you'll still need to tweak a few things to get audio and graphics working properly. At this point, you can click the "X" in the upper-right corner of the window to power off the virtual machine. When it finishes, it'll take you to a black screen with white text.
It took me about 20 minutes to install OS X. The rest of the installation should be pretty self-explanatory, and should go off without a hitch. When you do, exit Disk Utility and continue with the OS X installation as normal.
Go to the "System" section and uncheck "Enable EFI". From here, right-click on your OS X machine in the left sidebar and click Settings.When you're done, VirtualBox should take you back to the main screen. Create your new disk in VDI format and with dynamically allocated storage. Click Next again, and choose "Create New Disk".4GB of RAM should be a good amount, though I gave mine 6GB since I had RAM to spare. This depends on how much RAM is in your system-you can get away with 2GB, but if you have more, give it more. Click Next and choose how much RAM to give your virtual machine.Give your new virtual machine a name (I just called it "Mac OS X") and set the operating system to "Mac OS X Server (64-bit)". Start up VirtualBox and click the New button.Step One: Install and Set Up VirtualBoxīefore we install OS X, we'll need to set up VirtualBox so the OS X install disc can boot correctly. Make sure to download MultiBeast 4-it's labeled "Lion", but for our purposes the Lion version works better than the Mountain Lion version.
You'll need to register for a free account over at to download this.
If that doesn't sit well with you, you can head over to the Mac App Store and buy a legit copy for yourself, so you can at least pirate with a clear conscience. The hacking group Olarila has put a great installation ISO together, and you can find it by searching Google. Sadly, this won't work with a vanilla Mountain Lion installer, so you'll have to find a compatible hacked version. You should download the main program and the Extension Pack, which will give you support for USB devices. VirtualBox doesn't officially support OS X, but it's actually very easy to get up and running.
Mountain Lion is 64-bit, and thus requires your copy of Windows to be 64-bit.