To create a virtual machine, open up Virtualbox and click “New” on the upper left. Give your new virtual machine a name, and choose “Mac OS X” for the OS Type.If your version of Virtualbox asks you to choose between 64-bit and 32-bit, be sure to choose 64-bit.
I recommend assigning at least 4 GB of RAM to the virtual machine, but you can assign as little as 2 GB of RAM.
Step 3: Give your new virtual machine an operating system.
Your virtual machine will now be created. But don’t stop now- Your new virtual machine will show up on the left column of the Virtualbox start page. Select your Mac OS X virtual machine (single-click) from the main page of Virtualbox, and open up the virtual machine settings. Once the settings open up, go to “System” and uncheck the “Enable EFI” box.
In addition, make sure that “Enable IO APIC” is checked. Then, click on the “Acceleration” tab and check both of the options there.
Once you’re done with that, go to the settings for “Storage”. In the storage tree box, you’ll see a CD icon labeled “Empty”. Click on it and click “Choose a virtual CD/DVD disk file”. In the window that pops up, choose the .iso or .dmg file for iAtkos (or whichever distro you downloaded).
Step 4: Installation of Mac OS X Lion
Start up your virtual machine. You should come up to a screen with the black-and-white picture of the iAtkos Lion.
Press enter to startup the Lion installer.
Continue, and you will eventually come up to a page that asks you for a “destination” for your Mac install. Oh no, the page is blank! We’ll have to fix that. To do this, start up Disk Utility .
Mac OSX can only be installed on a completely clean disk, so you need to use Disk Utility to wipe your Virtualbox hard disk. Click on the Virtualbox hard disk in Disk Utility and erase it.
On the installation page for Mac OSX, the Virtualbox hard disk should now be showing up. Select it and continue.
Once that’s done with. This will take at least 20 minutes.
After installation finishes, Mac OS X will crash. This is normal.
Restart your virtual machine, and eject iAtkos from your virtual DVD drive. To eject iAtkos, right-click on the CD icon at the bottom right of the Virtualbox window, and un-check the iAtkos file. (The below screenshot is different because it’s taken from my Snow Leopard guide)
After ejecting iAtkos, restart your virtual machine again. Now, at the bootup screen, you’ll see an icon for the hard drive where you installed Lion. Select it and press “Enter”. Lion will boot, and you should eventually be led to the Mac OS X setup screen. Fill it out, then mission accomplished!