Note, 12/31/2012: With the release of iATKOS ML2, the below tutorial is a bit dated and difficult. Find the iATKOS ML2 tutorial here.

Note, 12/30/2012: As of today, I will only read comments on THIS post. You can still read this tutorial and comment on it, but you won’t be getting any support from me. The link is the same tutorial as this one, but just on a different website.

Note: This post is essentially a copy of the original tutorial that I made back in February here. There are just some minor changes to reflect the GM/final build of 10.8 Mountain Lion. Most of the process is exactly the same as before.

With the release of the GM (final) build of Mountain Lion 10.8 yesterday, hackintoshers have been busy yet again. If you’re new, fortunately, it’s still very easy to do, and the steps to get it to work closely follow 10.7 “Lion”. The below guide is a rewrite of our 10.7 guide, which can be found here. The overall process is rather straightfoward, and the below instructions should be easy for everyone. Continue reading below for the requirements, downloads, and the steps. You’ll be able to install Mountain Lion from a USB flash drive, too! Also, this guide may look long, but it honestly isn’t too difficult. The entire process, including installation, should take less than 45 minutes, assuming your hardware doesn’t give you any problems. Lastly, check out our demo video showing Mountain Lion fully working.

Credits/Sources

Everything OSx86-related is a collaborative effort amongst people who enjoy doing these things, as well as those of us who enjoy tweaking and experimenting with things. Below are a list of sources used to compile this guide:

1. http://www.insanelymac.com/forum/index.php?showtopic=275957&st=0
2. http://www.osx86.net/view/2415-chameleon_2.1svn_r1820_with_smbios_amp;_10.8_support.html
3. http://www.osx86.net/view/2902-os_x_mountain_lion_gm_mbr_patch.html
4. http://thetecherra.com/2011/09/05/how-to-create-a-bootable-hackintosh-ready-mac-os-x-lion-usb-flash-drive/
5. http://thetecherra.com/2012/02/17/tutorial-run-os-x-mountain-lion-10-8-on-a-pc-hackintoshosx86-from-start-to-finish-2/

My 10.8 GM desktop.

Requirements

Here are the requirements:

1. A copy of Mac OS X - This can be in the form of an existing hackintosh, a virtual machine within Windows or Linux, or even a regular Mac. If you don’t have any of these things, then find someone who can help you out for a while. I prefer using a virtual machine (I prepared my USB drive with VMware Workstation under Windows 7). Using an already working copy of Mac OS X either in a VM or a native hackintosh install is HIGHLY recommended, and you’ll see why in part 6.
2. A 8GB USB flash drive (or larger) - We’ll be copying the files to the drive appropriately, so make sure that you have a flash drive with enough storage space (8GB or larger).
3. A copy of Mountain Lion 10.8 GM - If you don’t have a Mac Developer Account, then you’ll find torrents of 10.8 around the web.
4. 30-60 minutes of time - Depending on how tech-savvy you are, this may be quick, or it may take a while.
5. An SSD or HDD to install 10.8 to - For me, I used a 20GB partition on a 64GB SSD to install 10.8 to.
6. THIS file - This ZIP file contains everything that you need to get your flash drive properly prepared.

Note: The file for number 6 contains the following:

• FakeSMC.kext
• NullCPUPowerManagement.kext
• OSInstall
• OSInstall.mpkg
• Chameleon_2.1svn_r1820_trunk_10.8.pkg

The first 2 .kext files will fix most kernel panics that you might experience while booting. The 2 OSInstall files will allow you to install 10.8 onto an MBR-partitioned drive. OSInstall came from 10.7.3, and OSInstall.mpkg was modified by me to work properly. Lastly, the Chameleon package is the bootloader that we’ll be using, and has been specifically compiled for use with 10.8.

My Specs

My test installation was successfully done on a custom-built gaming PC with the following specs:

• Intel Core i7-2600K @ 4.5GHz
• 8GB DDR3 1600 RAM
• OCZ Vertex 2 60GB SATA II SSD (20GB for 10.8, everything else for Windows 7)
• Seagate Barracuda 1TB SATA III HDD
• NVIDIA GeForce GTX560 1GB (works OOTB)
• Intel Wi-Fi of some sort; not OS X compatible at all (Ethernet works fine)
• ALC892 audio (drivers are available)
• 1920×1080 Acer monitor (DVI)

Part 1 – Preparing your SSD or HDD

If you’re in Windows 7, you can easily make a new partition on an SSD or HDD via the Disk Management program.

1. Start>Run (or Windows key on your keyboard plus R).
2. diskmgmt.msc (press enter after typing that)
3. Find your drive, right-click on it, and go to Shrink Volume.
4. Wait for it to calculate the amount of space you can make your partition, and enter in your amount (for an exact GB amount, multiple your desired amount of GB times 1024, so a 20GB partition would be 20480MB).
5. Let it make your partition. It will show up as unallocated space.
6. Format the new unallocated space as NTFS and give it a label (mine was ML).
7. Done!

Part 2 – Formatting your USB drive

Make sure to backup the files that are already on your USB flash drive via Disk Utility in Mac OS X:

1. Open up Disk Utility.
2. Click on your USB drive in the left sidebar.
3. Click on the Erase tab in the middle.
4. Choose “Mac OS X Extended (Journaled)” as the format, and give your drive a label (like “ML USB”).
5. Click on the Erase… button.
6. Done!
7. Leave Disk Utility open, as you’ll need it later.

Part 3 – Preparing your USB drive with 10.8

This part is the most time consuming. Using a USB 3.0 flash drive will help things out quite a bit.

1. Mount the DMG for Mountain Lion (will be called Mac OS X Install ESD on your desktop).
2. Show hidden files in Finder by running the following command in Terminal: defaults write com.apple.finder AppleShowAllFiles TRUE
3. Reload Finder by running the following command in Terminal: killall Finder
4. Run the following command in Terminal to mount “BaseSystem.dmg” within the 10.8 DMG: open /Volumes/Mac\ OS\ X\ Install\ ESD/BaseSystem.dmg
5. Switch back to Disk Utility.
6. Click on your flash drive in the left sidebar.
7. Click on the Restore button in the middle area.
8. For the source, drag “Mac OS X Base System” from your desktop into the empty Source box.
9. For the destination, drag your USB drive from your desktop into the empty Destination box.
10. Make sure that “Erase destination” is checked.
11. Click on “Restore”. This process will take anywhere from 5 to 10 minutes depending on the speed of your flash drive.
12. When it’s finished, you’ll end up with 2 “Mac OS X Base System” drives on your desktop. Figure out which one is your USB copy (you can right-click > Get Info and use the capacity as an indicator), and open it up.
13. Once you’ve opened up Mac OS X Base System (the one that’s your flash drive), go to /System/Installation.
14. You’ll see a symlink for Packages. Remove it.
15. Create a folder called Packages.
16. Open up a window of the original Mac OS X Install ESD drive and copy everything within Packages to the empty Packages folder on your USB drive.
17. Done! 10.8 is now installed onto your USB drive. Now, we need to modify some of the files on it so that it will properly bootup on a PC.

Part 4 – Adding the fixed 10.8 files to the USB drive

Now, we need to modify some of the files on your USB drive so that it will properly bootup on your PC.

1. Extract the contents of “ML_GM_OSx86_Files.zip” to your Mac OS X desktop.
2. Copy the 2 .kext files to /System/Library/Extensions on your flash drive.
3. Copy the OSInstall file to /System/Library/PrivateFrameworks/Install.framework/Frameworks/OSInstall.framework/Versions/A/, overwriting the file that’s already there.
4. Copy the OSInstall.mpkg file to /System/Installation/Packages/, overwriting the file that’s already there.
5. Run the Chameleon installation package. Make sure to install this package to your flash drive, and customize the installation so that you have an SMBIOS that best relates to the CPU that’s on your computer (leave the default options checked; just check your SMBIOS).
6. Copy mach_kernel from the root of the Mac OS X Install ESD volume and paste it into the root of your flash drive.
7. Lastly, copy the Chameleon installation package to the root of your flash drive. You’ll need this in part 8.
8. Done!

Part 5 – Installing 10.8 from your USB drive

Time for the fun stuff! We’ll now boot from your USB drive and install 10.8 onto the partition that you made in part 1.

1. Boot from your USB drive.
2. Once in Chameleon, highlight your flash drive and add -v to the end, then push enter. You’ll see a lot of text fly by.
3. Once you get into the installer (assuming your computer didn’t freeze, restart itself, or get a kernel panic, in which case you’ll take a picture of the lines on your screenshot and leave it in the comments below), choose your partition to install 10.8 to. Please note that you’ll need to go to Utilities > Disk Utility and format your partition to HFS+ (Mac OS Extended (Journaled)).
4. The installation process will take about 5 to 15 minutes, depending on the speed of both your USB drive and your SSD or HDD.
5. When finished, boot back into your already working copy of Mac OS X.

Part 6 – Preparing the installed copy of 10.8

Now, we’ll have to add a couple of files to your fresh install of 10.8. You can use some Terminal commands to copy the files over, which I’ll cover now.

1. Boot from your USB installation drive.
2. In the Utilities menu, go to Terminal.
3. Run the following command: cp -R /System/Library/Extensions/NullCPUPowerManagement.kext /Volumes/NAME_OF_10.8_INSTALLATION_DRIVE/System/Library/Extensions/
4. Run the following command: cp -R /System/Library/Extensions/FakeSMC.kext /Volumes/NAME_OF_10.8_INSTALLATION_DRIVE/System/Library/Extensions/
5. Run the following command: reboot
6. You should now be able to boot back into your install copy of 10.8. Now, install Chameleon as in part 4. As the destination drive, choose your 10.8 installation drive.
7. Done!

Part 7 – Booting 10.8!

Now that everything is finally prepared, you can go ahead and boot into Mountain Lion.

1. Boot from your USB drive again.
2. Once in Chameleon, highlight your partition that has 10.8 installed. Add -v to it and push enter. You’ll see a lot of text fly by.
3. You’ll eventually get to the setup screens for 10.8. Go through that process to setup 10.8.
4. Done!

Finished!

You’ve successfully prepared a 10.8 flash drive and have installed 10.8 onto your computer. Depending on your hardware configuration, you’ll most likely need to hunt down various drivers to get different components to work the way they should, such as your audio card, video card, and more. tonymacx86′s MultiBeast software contains a lot of common drivers for most machines and is worth a look at.

If you’re experiencing any trouble, leave your comment below and I’ll try and help you out.

Feel free to follow Brian and The Tech Erra on Twitter!

Video