Installing Mac OS X Virtual Machine on VirtualBox. 1- Download Mac OS; 2- Create Mac OS Virtual Machine; 3- Configure. 10.10, Yosemite, June 2014. Download OS X Yosemite Apple announced OS X Yosemite on June 2, 2014, a powerful new version of OS X redesigned and refined with a fresh, modern look, powerful new apps and amazing new continuity features that make working across your Mac and iOS devices more fluid than ever.

At sandstorm media, we use a wide array of software tools to run our operations. We try to keep our working environments synchronized to prevent these nasty “But it works on my machine!” issues. That's why we're using Ansible to configure the software on our Macs.

While they save us a lot of time in day-to-day business, we do need to configure and test our Ansible scripts from time to time. It's sensible to do that in a virtualized environment, since reinstalling OSX everytime you want to test something is not very practical.

Getting OSX 10.10 Yosemite to run inside a VirtualBox is a tad tricky, which is why I describe the steps how to do it here. This tutorial assumes that the host system is an OSX machine as well.

Step 1: Obtain The Installer File

To get OSX running in a virtual machine, you need a bootable ISO first. The simplest source of one is in fact the Mac App Store (assuming you're running Yosemite already). Just search for “Yosemite” and you will be presented with the option to download the installer.

Start the 6GB download. Once that has finished, it's time for:

Step 2: Create A Bootable Yosemite ISO

The installer file, called “Install OSX Yosemite.app”, should now be available in your “Applications” folder. We want to extract the actual image file to create a bootable ISO from that. Right-click the installer file and click “Show Package Contents”.

In the resulting screen, open “Contents > SharedSupport” and locate the “InstallESD.dmg” file. Save that to a separate folder, as it's the one we will continue working with.

The image file we extracted just now is not bootable yet. To do that, we need to run a few operations with the Disk Utility on it. This is most conveniently done via a shell script. Copy the following code (thanks to Jhon Quintero), paste it in a file named “createISO.sh” and place this file in the same folder that you copied the “InstallESD.dmg” file to. Make it executable via “chmod +x createISO.sh” and run it.

If everything went well, you'll now have a bootable image file called “Yosemite1010.iso” in your folder. This is what we'll now use to create the VM.

Step 3: Create a VM with the ISO

Fire up VirtualBox and create a new VM. Select Mac OS X as the operating system and 10.9 as the version (it'll work with 10.10, too).

Leave all the settings as default, and make sure you make the virtual disk big enough. After the VM is created, access its settings and change to the “System” tab. Select “PIIX3” as the chipset.

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After that, there's one more thing to do if you're running a recent (2014 or later) MacBook. On the new Haswell cores, OSX tries to use a chipset feature that does not work within VirtualBox. This will result in an error message ('Missing Bluetooth Controller Transport') during the boot process (more information can be found in a VirtualBox ticket on the issue). As a workaround, we will make the VM believe it's running on an older processor by changing the processor identification with the vboxmanage command:

After that is done, your VM should be good to go. Fire it up and after a while, you'll hopefully be presented with the welcome screen. Happy VM-ing!

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