How to Install Mountain Lion 10.8.3 On a PC


Older Lower-End Parts List:

  • Intel core i3 3225 dual core cpu                                $130
  • Gigabyte GA-Z77N-WIFI motherboard                     $110
  • 4gb ddr3 RAM                                                           $25
  • 250gb hard drive                                                       $30
  • 460W Cooler Master PSU                                        $40
  • Bitfenix Prodigy case – Black                                    $70

Total: $405 +taxes & Shipping

Higher-end Parts List:

Click Here for Power Supply Calculator  


Installing Mountain Lion OSX 10.8.0

 What Hardware You Need:
1. Built PC
2. Any Computer Running Mac OSX Snow Leopard 10.6.6 or later.
3. USB Stick 8Gb or Larger

What you need to Download: Click for the link

Mountain Lion ($19.99 from App store)

Mountain Lion 10.8.3 Combo Update




Inorder to download Unibeast, Multibeast  and DSDT files you need to have an account on tonymacx86.  If you don’t have an account then you can create an here.


STEP 1: Download OSX Mountain Lion and all other files 

1.You can buy and download Mountain Lion from the Mac App Store using an Apple ID on any Mac or functional computer running OS X 10.6.6 or later.

2. Download Mountain Lion 10.8.3 Combo Update

3. Login to tonymacx86, and download the latest versions of UniBeastMultibeast, and DSDT for your motherboard.

4. Rename the DSDT file just “DSDT.aml”.

STEP 2: Create a Bootable USB Drive

1. Insert the USB drive that is 8Gb or larger

2. Open Disk Utility, by searching “disk utility” in spotlight search

3. click the USB drive in left column

4. Click on the Partition tab

5. Click Current and choose 1 Partition

6. Click Options…

7. Choose Master Boot Record

8. Under Name: type USB

9. Under Format: choose Mac OS Extended (Journaled)

10. Click Apply then Partition

11. Download and run UniBeast for Mountain Lion

12. Click Continue, Continue, Continue, Agree

13. At Destination Select, choose USB and click Continue


14. If using a Socket 1156 system without Rate Matching Hub (RMH) USB choose Legacy USB Support

15. If using a laptop, choose Laptop Support

16. Click Continue

17. Enter password and click Install

The process will only take about 10-15 minutes, but will show hours. This is normal. Do not unplug computer or do anything at this time.

18. When Unibeast is done Copy all the downloaded files Unibeast, Multibeast, ML 10.8.3 Combo Update, and DSDT file to a separate USB drive or to your newly made Unibeast USB drive.


STEP 3: Install OS X Mountain Lion

But USB Set your BIOS or UEFI to Optimized Defaults, and your hard drive to AHCI mode.

If you’re using a Gigabyte Z77N WIFI you really don’t have to do anything with the BIOS Out of the box.

1. Turn on the computer

2. Press the F12 if you have a Gigabyte motherboards (F8 on Asus motherboards)  to choose boot device

3. Choose USB and hit enter

4. At the Chimera Boot Screen, choose USB and hit Enter

Boot Troubleshooting Tips

If you have any problems during the boot process such as Black Screen, White Screen, Flickering Screen etc. Type some of these commands at the boot screen.

UniBeast has PCIRootUID=1 set by default for the most universal support for recommended builds. Set it manually to 0 by typing this command at the boot screen above.
Safe Mode- loads only basic drivers. Sometimes a cure-all to reach the installer.
Verbose Mode- allowing you to see the loading of the OS instead of the Apple Boot Screen.
This setting may be necessary on motherboards using Fermi and Kepler NVIDIA cards for installation.

5. When you arrive at the Installer, choose language.

6. You MUST format the destination drive:

a. In the top menu bar choose Utilities, and open Disk Utility
b. Highlight your target hard drive for the Mountain Lion installation in left column.
c. Click Partition tab
d. Click Current and choose 1 Partition
e. Click Options
f. Choose GUID Partition Method
g. Under Name: type Mountain Lion
h. Under Format: choose Mac OS Extended (Journaled)
i. Click Apply then Partition
j. Close Disk Utility

7. When the installer asks you where to install, choose Mountain Lion, or your existing install.

8. When install has succeeded, restart the system.


STEP 4: Post-Installation Using MultiBeast

1. Turn on the computer

2. Press the F12 if you have a Gigabyte motherboard (F8 Asus motherboard)  to choose boot device

3. Choose USB again

4. At the Chimera Boot Screen, choose your new Mountain Lion installation on your HDD.

5. Complete Mac OS X Mountain Lion initial setup.

6. Drag downloaded files Unibeast, Multibeast, ML 10.8.3 Combo Update, and DSDT from your USB drive to your desktop.

7. Install the Mountain lion combo Update. DO NOT RESTART WHEN IT  IS COMPLETE.

8. Go to Preferences/Security & Privacy and Enable Downloads from anywhere.

enter image description here

9. Open and run Multibeast’s UserDSDT or DSDT-Free Installation and any further drivers to enable audio, network, graphics, etc…

My Multibeast installation

10. Complete Multibeast installation and restart.

 And you’re DONE!!! You now should have the latest version Of OSX installed on your PC.

10 thoughts on “How to Install Mountain Lion 10.8.3 On a PC

  1. Hi, Loved your video on Youtube ! At the start you mention the Z77n mini itx board. Then later in the video when you list the parts its listed as H77N does it matter which model ?



  2. thanks for this. im using an i7 2600k, asrock p67 b4, sli 560 ti, 16gb ram, and a few hdds. ive heard you cant install osx initially on anything bigger than 4gb of ram and no more than 1 hdd, so im going to unplug the hdds i dont want used, but im going to try and leave my ram in cause my cpu cooler is so big it covers my ram even. im getting pumped for installing, but i need to find a mac first 🙁

    if i run into any problems and find a solution, ill be sure to report back with a solution. if i dont reply back, then my setup worked fine. im also worried about the sli, but its not a huge deal to have sli on osx anyways.

    thanks again for such a good write up man

  3. Hello waj

    First of all i want to thank you for this great tutorial

    I have few question it will really help me if you will answer this question
    I have bought all the system parts and i tried to install but the issue i got is that i am not able to download mountain lion from app store because of some bank issue

    that is why i installed mountain lion from torrentz file name is InstallESD.dmg

    my question are as below
    1 -> the mountain lion which you downloaded from the store is .dmg file?
    2 ->can you provide me the name of that file so i rename my file and change to real name
    3->do you think there will any issue i will face if i go in this way?
    4-> in step 18. When Unibeast is done Copy all the downloaded files Unibeast, Multibeast, ML 10.8.3 Combo Update, and DSDT file to a separate USB drive or to your newly made Unibeast USB drive.
    so where should i put mountain lion.dmg? in the same pen drive with these files?

    5-> right now my computer in c drive windowns 7 is installed i am going to install mountain lion on D drive i will be able to chose operating system when i am truing on my computer if not then how can i achieve this

    If you will answer this question then the investment i have made will be worth
    I will wait for your reply

    One of your subscriber


  4. Hi Majid,

    I’ve checked your videos how to build and install MAC OS on a Hackintosh and look pretty easy for no computer guy. I’m willing to build a HackPro initially for fun and then for professional use. But have 3 questions:
    1) About the motherboard exist any motherboard that you can recommend that allows install more than 4 memory ram, that has bluetooth and wifi already integrated to avoid install additional cards?
    2) About the MAC OS, there is possible install a SSD in my current MacPro 2008 and mount the operating system 10.9 and then extract the SSD and install it on HackPro, will it make the computer start up and work?, or I necessary do the entire steps that you mentioned on the videos with the SSD / HD installed on the new computer?
    3) About Intel chip, we are thinking use the computer for video and rendering of professional architectural drawings, which chip you recommend?

    Thanks for yours troughs


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