- Added update 10.8.3 steps in the document
- Added new zip file Videofix1083.zip for update 10.8.3
- Latest PDF version 2.1 with date 19 April 2013
Updated 27 Februari 2013
- Added version number of PDF Document and date stamp of modification
- Latest PDF version 2.0 with date 27 Februari 2013
Updated 18 december 2012
- Some text changes in Chapter 13 about kext utility.app.
- Thks goes to Pingu for the changes.
Updated 22 october 2012
- fixed correct links to Chapters 11.
- Some text changes in Chapter 7,10,11 and 15.
- Thks goes to julianarevalo for the changes.
Updated 08 october 2012
- fixed correct links to Chapters.
- Add Numbers to Chapters.
- Some text changes.
- New uploaded PDF File.
Run OSX Mountain Lion on a Dell Optiplex 780
This tutorial will describe the steps to install Mountain Lion on a Dell Optiplex 780 (this will also works on a 760).
The installation goes to the latest update 10.8.3, and when there is a new update i will change the tutorial as soon as possible.
If you find any mistakes or have something to improve then please send me a PM and i will update the tutorial.
You can also see my configuration on the OSX86 Wiki Project Page.
I have also included the PDF file of the guide and the zip files to install Mountain Lion.
A special thanks goes to Brian from Tech Erra for using parts of their tutorial.
I am from The Netherlands so sorry for my bad English.

1. 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: 2. Requirements
Here are the requirements:
- A Dell Optiplex 780 – This is necessary to install mountain lion for this tutorial
- 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 hackintosh with OSX Lion.
Using an already working copy of Mac OS X either in a VM or a native hackintosh install is HIGHLY recommended. - 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).
- 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.
- 30-60 minutes of time – Depending on how tech-savvy you are, this may be quick, or it may take a while.
- An SSD or HDD to install 10.8 to – For me, I used a 160GB partition to install 10.8 to.
- An PCI Express Video Card – For use with QE and CI Highly recommended. I use a Ati Radeon HD5450 512MB but 1GB or 2GB also works.
- Boot780.zip – This ZIP file contains everything that you need to get your flash drive properly prepared.
- Install780.zip – This ZIP file contains everything that you need to get your Dell Optiplex Hardware to work with Mountain Lion OSX.
- Videofix1083.zip – This ZIP file contains kext files for the videofix in 10.8.3( see chapter 15).
- FakeSMC.kext
- NullCPUPowerManagement.kext
- EliottForceLegacyRTC.kext
- OSInstall (Not used for my configuration because I use the entire hard disk)
- OSInstall.mpkg (Not used for my configuration because I use the entire hard disk)
- Chameleon_2.1svn_r1820_trunk_10.8.pkg
- ShowHiddenFiles.app
- Org.Chameleon.Boot.plist
The 2 OSInstall files will allow you to install 10.8 onto an MBR-partitioned drive. Lastly, the Chameleon package is the bootloader that we’ll be using, and has been specifically compiled for use with 10.8.
Note: The files for number 9 Install780.zip contains the following:
- AMDRadeonAccelerator.kext
- AppelIntelE1000e.kext
- ATI5000Injector.kext
- EFIStudio-1.1.app
- EliottForceLegacyRTC.kext
- FakeSMC.kext
- Kext Utility.app
- NullCPUPowerManagement.kext
- VoodooHDA.kext
- AMDRadeonAccelerator.kext
- ATI5000Controller.kext
My installation was successfully done on an Dell Optiplex 780 Desktop computer with the following specs.
NOTE: A PCI video card is recommended to use the full potential of OS of Mountain Lion because the on board video card doesn't support QE/CI.
- Intel Core 2 Duo E7500 @ 2.93GHz
- 4GB DDR3 1333Mhz RAM
- Western Digital 160GB HDD
- ATI RADEON HD5450 512MB
- Intel WG82567LM onboard network
- Bluetooth USB Cambridge silicon radio (works OOB)
- ADI 1984A HDA audio onboard
- HP W2207h Monitor 1680×1050 display
- Apple Magic Trackpad
If you intent to install OSX86 Mountain Lion On the same Hard disk as your windows follow the steps below.
For a clean install on a new formatted hard disk go to Chapter 5.
If you’re in Windows 7, you can easily make a new partition on an SSD or HDD via the Disk Managementprogram.
- Start>Run (or Windows key on your keyboard plus R).
- diskmgmt.msc (press enter after typing that)
- Find your drive, right-click on it, and go to Shrink Volume.
- 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).
- Let it make your partition. It will show up as unallocated space.
- Format the new unallocated space as NTFS and give it a label (mine was ML).
- Done!
Start OSX Lion or Snow Leopard to prepare your USB Flash drive
Make sure to backup the files that are already on your USB flash drive via Disk Utility in Mac OS X:
- Extract both zip files (Boot780 and Install780) to your Mac OS x desktop
- Put USB drive in your Mac
- Open up Disk Utility.
- Click on your USB drive in the left sidebar.
- Click on the Erase tab in the middle.
- Choose “Mac OS X Extended (Journaled)” as the format, and give your drive a label (like “ML USB”).
- Click on the Erase… button.
- Done!
- Leave Disk Utility open, as you’ll need it later.
This part is the most time consuming. Using a USB 3.0 flash drive will help things out quite a bit.
- Mount the DMG for Mountain Lion (will be called Mac OS X Install ESD on your desktop).
- Show hidden files by running the app ShowHiddenFiles in the folder Boot780 on your desktop.
- Click on Show Special Files (leave the app ShowHiddenFiles open we need this later).
- In the folder MAC OS X Install ESD right click on Basesystem.dmg and choose “ open with DiskImageMounter(default)
- Switch back to Disk Utility.
- Click on your flash drive in the left sidebar.
- Click on the Restore button in the middle area.
- For the source, drag “Mac OS X Base System” from your desktop into the empty Source box.
- For the destination, drag your USB drive from your desktop into the empty Destination box.
- Click on “Restore” and type your password. This process will take anywhere from 5 to 10 minutes depending on the speed of your flash drive.
- When it’s finished, you’ll end up with 2 “Mac OS X Install ESD” 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 rename it to MLINSTALLUSB, after that open it up.
- Once you’ve opened up MLINSTALLUSB (the one that’s your flash drive), go to /System/Installation.
- You’ll see a symlink for Packages. Remove it.
- Create a folder called Packages.
- 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.
- 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.
Now, we need to modify some of the files on your USB drive so that it will properly bootup on your PC.
- Open the folder “Boot780” on your Mac OS X desktop.
- Copy 2 .kext files (FakeSMC.kext, NullCPUPowerManagement.kext) to /System/Library/Extensions on your flash drive.
NOTE: The 2 OSInstall files will allow you to install 10.8 onto an MBR-partitioned drive, if you install it on the entire hard disk skip step 3 and 4 an go further with step 5. - Copy the OSInstall file to /System/Library/PrivateFrameworks/Install.framework/Frameworks/OSInstall.framework/Versions/A/, overwriting the file that’s already there.
- Copy the OSInstall.mpkg file to /System/Installation/Packages/, overwriting the file that’s already there.
- 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 imac9.1 for the Dell Optiplex 780).
- Copy now 3 kext files (FakeSMC.kext, NullCPUPowerManagement.kext, EliottForceLegacyRTC.kext) from folder Boot780 to /extra/extensions on your flash drive we need this for Chapter 11, Booting 10.8! .
- Copy mach_kernel from the root of the Mac OS X Install ESD volume and paste it into the root of your flash drive.
- Lastly, copy extracted folders (Boot780 and Install780) which you have extracted earlier from the zip files to the root of your flash drive. You’ll need this in Chapter 11.
- Eject all mounted drives (this is not necessary)
- Go to ShowHiddenFiles and click hide special files after that close program.
- Eject your USB Drive
- Done !
Before we boot from the Dell Optiplex we need to optimize the bios for Mountain Lion.
- Start your Dell Optiplex and press F2 to get into the Bios.
- Go to Boot Sequence and choose on the right for USB Device and click the up arrow so that the USB Device is on top, click on apply to make the setting.
- Go then to Drives - Sata Operation and choose on the right for Raid Autodetect/AHCI click again on apply and choose exit, now the Bios is ready for installing Mountain Lion.
Time for the fun stuff! We’ll now boot from your USB drive and install 10.8 onto the partition or Hard Drive.
- Boot from your USB drive.
- 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 be patience startup may take a while.
- Once you get into the installer (assuming your computer didn’t freeze, restart itself, or get a kernel panic), choose your partition or Hard Disk to install 10.8 to.
- NOTE : when you install it on a partition skip step 5 - 10 see Chapter 4.
(If you install Mountain Lion on the entire Hard disk follow the steps below ) - In the installer open up Disk Utility.
- Click on your Hard Drive in the left sidebar.
- Click on the Erase tab in the middle.
- Choose “Mac OS X Extended (Journaled)” as the format, and give your drive a label (like “ML OSX”).
- Click on the Erase… button.
- Done close Disk Utility and go further with the installation process.
- The installation process will take about 5 to 15 minutes, depending on the speed of both your USB drive and your SSD or HDD.
- When finished, boot back into your already working copy of Mac OS X.
Now that everything is finally prepared, you can go ahead and boot into Mountain Lion.
- Boot from your USB drive again your computer won't still be able to boot from the hard drive.
- 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 again be patience startup will take a while.
- You’ll eventually get to the setup screens for 10.8. Go through that process to setup 10.8.
- Choose by "How Do You Connect" for "My Computer Does Not Connect to the Internet" we will fix this later in Chapter 13, go further with the installation process.
- The installation process will take about 25 minutes, depending on the speed of both your USB drive and your SSD or HDD.
- Done! Proceed to Chapter 11 to install the bootloader to your partition so that you don’t have to rely on using your USB drive to bootup.
- Once in 10.8 go to finder – preferences –General and choose in show these items on the desktop for
- Hard Disk
- External Disk
- CD - Go also to System Preferences – Security& Privacy click on the lock on the left corner and type your password
- Choose by “Allow applications downloaded from: for “Anywhere – Allow from anywhere
- Close system preferences.
- Copy the folders "Boot780" and "Install780" from your USB Device to your Mac OS X desktop after that open up the Chameleon installation package in folder Boot780, and install Chameleon to your 10.8 partition (while choosing your SMBIOS imac9.1, just like before, This is similar to step 5 in Chapter 7.) .
- Done!
Starting up Mac OS X for the first time on your Hackintosh can be a very tricky process, which often requires you to set special boot options through the use of boot flags. For those of you who don't know, boot flags are "arguments" (pieces of data that you enter) to change the way that your bootloader runs. The bootloader is the program that boots Mac OS X. Boot flags can set the boot options for Chameleon, and any other boot CD or bootloader for Hackintoshes. Read past the break to learn how to use boot flags.
There are two ways to apply a boot flag: either by typing it into the bootloader before starting up Mac OS X, or by typing it into org.Chameleon.boot.plist, the settings file used by the bootloader.
See also Chapter Common boot options for Chameleon.
I have included a org.Chameleon.Boot.Plist for the Dell Optiplex 780
- Open the folder “Boot780.” and copy org.chameleon.Boot.Plist
- Past org.chameleon.Boot.Plist to /extra on your Hard Disk
- Now, we need to install some Kext files on your Hard Disk drive so that the hardware will work properly on your PC.
- Open the folder “Install780” and select the following Kext files
- AMDRadeonAccelerator.kext
- AppelIntelE1000e.kext
- ATI5000Injector.kext
- EliottForceLegacyRTC.kext
- FakeSMC.kext
- Kext Utility.app
- NullCPUPowerManagement.kext
- VoodooHDA.kext - Drag the Kext files (which are mentioned above) over "Kext utility.app" (contained in folder “Install780”) and release the mouse
- Type your root password and the Kext files will be installed on your Hard disk.
- Reboot.
- Once in 10.8 go to System Preferences – Network
- There will be a message saying “Network device is detected”
- Choose apply if you want to use DHCP or give a IP Address if you use static IP.
- Click apply to make the setting active.
- Don't update thru Software Update download the combo update here Download from the apple site.
- Run the 10.8.2 combo update walk thru the steps.
- After installation there will be a message saying to restart your system DON’T RESTART.
- We will fix the video after the update, go to folder Install780 on your desktop.
- Drag the Kext files AMDRadeonAccelerator.kext and ATI5000Injector.kext to Kext Utility and type your password the files will be installed, after install reboot.
- Now reboot with -v.
- After Reboot go to about this Mac and check if the version is 10.8.2
- The update is finished.
- Don't update thru Software Update download the combo update here Download from the apple site.
- Unpack the Videofix1083.zip to your desktop.
- Run the 10.8.3 combo update walk thru the steps.
- After installation there will be a message saying to restart your system DON’T RESTART.
- Run the Chameleon installation package. Make sure to install this package to your Hard 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 imac9.1 for the Dell Optiplex 780).
- We will also fix the video, go to folder Videofix1083 on your desktop.
- 7Drag the Kext files AMDRadeonAccelerator.kext and ATI5000Controller.kext from the Videofix1083 directory to Kext Utility and type your password the files will be installed, after install reboot.
- Now reboot with -v.
- After Reboot go to about this Mac and check if the version is 10.8.3
- The update is finished.
If AppStore and iCloud doesn't work follow the steps below.
- Open up EFI Studio in folder “Install780.” , select Ethernet, select Add Device.
- On the new window you will see a lot of numbers (Hex String) in the second row.
- Then clicked write to com.apple.boot.plist.
- Then go to /Library/Preferences/SystemConfiguration/apple.com.boot.plist and select the new key and string it added.
- Now you can add the Hex Strings to your org.chameleon.boot.plist(com.apple.boot.plist) see Chapter 12 which should be in root/extra folder. When you add it manually make sure it is in
- <key>device-properties</key>
- <string>Your Hex String here</string> arguments after that.
- Remove all network devices from System Preferences/Network.
- Delete in library>preferences>system configuration> NetworkInterfaces.plist file.
- Finally, Reboot.
- After reboot, go to System Preferences/Network add devices. Click (Ethernet) FIRST!! Then add the other adapters you use to connect to the internet or Bluetooth.
- Voila. App Store and iCloud now works.
The HDMI from the Ati Radeon 5450 doesn’t work properly so we need to change this to Headphone, follow the step below to make sound work.
- Open System Preferences – Sound – Output – And choose for Headphones.
You’ve successfully installed Mountain Lion OSX onto your Dell Optiplex 780.



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