Alternate Guide #1 – OS X Snow Leopard Install using Retail DVD

NOTE: This guide is not current anymore: iBoot + MultiBeast is the recommended method for installation. 

Here is a second guide to install OS X on your computer using the Snow Leopard Retail DVD. It is more generic, and not system-specific, meaning you can use this guide for any PC that can run the Vanilla 10.6.2 kernel. It also loads the system directly without using any booted installer.

However, this guide does not enable sound or ethernet by default. Also, you will have to compile your own DSDT.aml, at least to stop the system from resetting your CMOS at each restart. Therefore, it can be much more complicated- you may run into trouble if this is your first attempt. I didn't include BIOS photos in this post, but you can refer to the previously posted guide for general BIOS settings. This guide is inspired by Prasys’ guide and ori0’s solution posted in comments.

What you need:

1. A Snow Leopard Mac OS X Install DVD
2. A Mac or Working Hackintosh running OS X Leopard or Snow Leopard
3. If using a Mac an external hard drive enclosure or adapter
   

STEP 1: PREPARE SNOW LEOPARD HARD DRIVE
You need to format your destination hard drive (Snow Leopard) to accept the installation. I strongly recommend using a SATA drive.

1. Open Applications/Utilities/Disk Utility.
2. Highlight the hard drive you want to use as the destination for your Snow Leopard Install in the left column.
3. Click the Partition Tab.
4. Click Volume Scheme- choose 1 Partition.
5. Click Options…
6. Select GUID Partition Table. Click OK.
7. In the Name: field type: Snow Leopard
8. In Format: field select Mac OS Extended (Journaled).
9. Click Apply, then click Partition.
10. Close Disk Utility.
11. Right click on Snow Leopard in Finder or Desktop. Choose Get Info.
12. In the lower right corner, click the lock icon open, type your password and un-check Ignore Ownership on this Volume checkbox. Click the lock icon closed.

STEP 2: MOUNT MAC OS X INSTALL DVD OR .DMG
In this step, we will install Snow Leopard directly to the hard drive without rebooting into any installer.

1. In the menu bar of Finder, select Go to Folder…
2. Type or copy & paste /Volumes/Mac OS X Install DVD/System/Installation/Packages/
3. Double-click OSInstall.mpkg
4. Click Continue three times, then Agree, select Snow Leopard, then click Customize…
5. Uncheck all Optional Installs. (If you need anything else, you can install it later.)
6. Click Install.

OS X will now install directly to your destination drive!

STEP 3: UPDATE SNOW LEOPARD TO 10.6.2
As of 10.6.2, and the release of the i5/i7 iMac, OS X Snow Leopard supports P55 based systems. The update will install the 10.2.0 Vanilla Kernel, as well as a host of security and stability fixes. Details are available on Apple’s website.

1. Download the Mac OS X 10.6.2 Combo Update here:
http://www.apple.com/downloads/macosx/apple/macosx_updates/macosxv1062updatecombo.html
2. Mount MacOSXUpdCombo10.6.2.dmg
3. Click Continue three times, then Agree, then Change Install Location…, select Snow Leopard, then Continue, then click Install and type your password.
4. Install MacOSXUpdCombo10.6.2.pkg

NOTE: If 10.6.2 will not install, replace the mach_kernel with Qoopz Voodoo kernel for 10.6.0 & 10.6.1. For details, see step 8 in the original guide.


STEP 4: INSTALL BOOTLOADER TO SNOW LEOPARD DRIVE
In this step you will install the Chameleon bootloader to your Snow Leopard hard drive.

1. Download tonymacx86-snowleopard.zip.
2. Open Apps folder
3. Open PC EFI 10.1
4. Click Continue, then Change Install Location…
5. Select Snow Leopard and click Continue.
6. Click Install, and then type your password.

STEP 5: COPY NECESSARY FILES TO SNOW LEOPARD DRIVE
In this step, you will copy the boot file and Extra folder from tonymacx86-snowleopard to Snow Leopard.

1. Open Applications/Utilities/Terminal
2. Type: sudo rm /Volumes/Snow Leopard/boot and type your password. (this deletes the boot file)
3. Close Terminal.
4. Set up Windows as shown in the photo.
5. Click and drag boot and Extra from tonymacx86-snowleopard to Snow Leopard. (You may also use DSDT.aml if you have a GA-P55M-UD2 or compatible board.)
   
6. Delete LegacyHDA_ALC888B.kext from /Extra/Extensions. (You may use this kext if you have a GA-P55M-UD2 or compatible board.)
7. Delete Extensions.mkext from /Extra. (You may use this kext if you have a GA-P55M-UD2 or compatible board.)
8. Download DSDTSE from here
9. Click and drag tonymacx86-snowleopard and DSDTSE to Snow Leopard.

STEP 6: FIRST BOOT
The first boot of your new Snow Leopard install will show you a video and then lead you through a standard OS X setup routine for a new Mac.

1. Complete the OS X setup routine.
2. When you get to the desktop, restart the computer. This helps set initial boot caches.
3. NOTE: Upon this reboot, your CMOS will reset to default settings. You will have to set up your CMOS settings again, as you do not have any DSDT.aml yet.

STEP 7: CREATE AND EDIT YOUR OWN DSDT.AML
Create, edit, and modify your DSDT as shown in the post below. This will rectify the CMOS reset issue.
http://tonymacx86.blogspot.com/2009/11/create-and-modify-your-dsdtaml.html

STEP 8: ENABLE SOUND, GRAPHICS, AND ETHERNET
The system should be set up for most nVidia graphics cards and some ATI cards automatically. Your com.apple.boot.plist located in /Extra contains the boot flag GraphicsEnabler=Yes. There are many ways to get sound, graphics and ethernet working. You may install one or more of the kexts to your system System-Library-Extensions in the tonymacx86-snowleopard folder in the following way. Or if the supplied kexts do not work, check kexts.com for more downloads.

1. Open tonymacx86-snowleopard.
2. Drag *.kext from System – Library – Extensions into Kext Helper b7.
3. Type your password and click EASY INSTALL.
4. Close Kext Helper b7.
5. Open Snow Leopard drive.
6. Drag /Extra/Extensions folder onto Kext Utility application.
7. Drag /System/Library/Extensions folder onto Kext Utility application.
8. Open Applications/Utilities/Disk Utility
9. Highlight Snow Leopard in the left column.
10. Click Repair Permissions.
11. Restart computer.

YOU’RE DONE!
You should now have a working Hackintosh running 10.6.2 Snow Leopard with the 64-bit kernel enabled! Special thanks to the entire OSx86 community! This guide was cobbled together from various sources- I did not invent this method, and do not wish to take any credit beyond putting it into plain English. ;)

Feel free to post any issues or comments- I'll try to help out any way I can.

-tonymacx86

PS: If you want to enable the Apple Boot Screen on startup, read this post:
http://tonymacx86.blogspot.com/2009/11/enable-apple-boot-screen.html

For discussions on this and other topics, register today at tonymacx86.com!

Create and Modify Your DSDT.aml

NOTE: As of the latest bios revisions by Gigabyte, the CMOS reset is now fixed.   (2010-05)

Using a DSDT (Differentiated System Description Table) is a necessity for running Snow Leopard on P55 boards. In the simplest of terms, it is a file that you place at the root of your system to tell OS X how to locate and enable features of your computer without checking your BIOS. For further details on what it is and how it works, check out http://wiki.osx86project.org/wiki/index.php/DSDT

You can tweak your system in all sorts of ways by changing lines of code in the DSDT.aml file. Unfortunately, you can't just open this file in TextEdit. From OS X, you must extract your DSDT.aml, convert it to DSDT.dsl, then edit it, then recompile it to DSDT.aml. To make it easy, the good folks from the EvOsx86 Team have made DSDTSE, a GUI application that allows you to do all of this in one convenient editor.

Using what I've learned from many OSx86 gurus, I will show you how to edit your DSDT.aml to allow your system to restart without clearing your CMOS. Other fixes are available for P55 boards as well- I have used the HDEF and USB fixes for my DSDT.

1. Open DSDTSE. You can download the application from here. This can be tricky- the application sometimes doesnt allow you to open it. Try opening it from a few different locations- I use my external drive.
2. Under Tools, choose Extract DSDT. The Editor will open with your DSDT.dsl all ready to edit.
3. Under ACPI search, type _WAK and click search. You should come to a line that looks like this:
Method (_WAK, 1, NotSerialized)
4. First you must apply the code that allows hacks. Under DSDT hacks in the Main pane menu, select option 1: Method DTGP. Select all of the code at the top of the page. Copy/paste the entire block of code as shown into the editor directly before the _WAK line with a space in between at the beginning and end. Be sure to keep all spacing exactly as it was or the file will not compile and your hack may not work.
5. Next, we will apply the code that will prevent the CMOS reset. Under ACPI search, type (RTC) and click search. You should come to a line that looks like this:
Device (RTC)
6. All you have to do here, is change the length of the IO segment in the code below from 0x04 to 0x02. There may be 2 places to make this change- change both.
7. Under File, click Compile DSDT. The editor will prompt you to Save the file, save it to the default location.
8. Open /Library/Application Support/EvOSoftware/DSDT/DSDTFiles/dsdt.aml
9. Drag dsdt.aml to your install drive in Finder. Rename it DSDT.aml.

You're done! You now have a system-specific DSDT.aml file that will prevent your P55 system from resetting the CMOS at each boot. The process can be tricky, but this guide should help to make it a bit easier. Special thanks to Stellarola from the Insanelymac boards for discovering this fix! And to netkas for posting it to his blog.

For discussions on this and other topics, register today at tonymacx86.com!

PC EFI v10.5 Compiled for P55- ATI Users Rejoice!

Hey all-

I just did a bit of research, and managed to compile netkas' PC EFI v10.5 to work with P55 boards. It was rather easy- it was 1 line of code changed in the freq_detect.c file.

I just updated tonymacx86-snowleopard.zip with the boot file.

This solves the 'system running too fast' issue, that was previously solved by a modified i5boot. PC EFI 10.5 is the latest and greatest Chameleon variant with many fixes and features not included in the official Chameleon RC3 release. For more information check out netkas' blog.

This change shouldn't affect my guides at all, and it will enable ATI users to use GraphicsEnabler=y boot flag to enable their cards! The fix also works for most nVidia cards. I updated the zip file to include this flag by default- now there is no need for NVEnabler 64.kext unless you're having issues with TV-out. I am still testing this issue, and will update the guide accordingly.

How to compile a patched Chameleon boot file for P55 boards.
EDIT: This guide is no longer necessary, as Chameleon RC4 now supports this fix by default.
1. Download any Chameleon source.
2. Open the folder i386/libsaio, and the file freq_detect.c in TextEdit
3. Type Command-F and find the word Nehalem
4. Delete this line of code:
if (cpu_family == 0x06 && cpu_model == 0x1a)
5. Add this line of code:
if (cpu_family == 0x06 && (cpu_model == 0x1a || cpu_model == 0x1e))
6. Open Applications/Utilities/Terminal
7. Open path to Chameleon folder
8. Type make clean
9. Type make embedtheme
10. If it compiled correctly, your patched boot file will be located in /sym/i386 :)

For discussions on this and other topics, register today at tonymacx86.com!

OS X Snow Leopard Install using Retail DVD For P55 Motherboards and Intel Core i5 and i7

NOTE: This guide is not current anymore: iBoot + MultiBeast is the recommended method for installation.

The following is not meant to be a definitive method for installing OS X on PC hardware. There are many methods, but this one allows you to install OS X on your P55 computer build using the Snow Leopard retail DVD. Also, it works every time, unlike other methods I have tried. I tailored the install method specifically for my computer, a Gigabyte P55M-UD2 motherboard with an Intel Core i5 750 processor, 4gb of G.Skill Ripjaws 1600 RAM and a Sparkle nVidia GeForce 9400 GT 1GB graphics card. Most likely the method will work for any P55 build, but you’ll have to modify which kexts you use for graphics, etc…

At the end of this guide, you will have a fully stable and functional P55 Hackintosh running OS X Snow Leopard 10.6.2 running the 64-bit Vanilla Kernel. All included kexts are 64-bit ready. The only thing that will not be enabled by default is system sleep. To enable sleep after your install, follow this guide: Advanced DSDT Fixes: Enable Sleep on P55 Motherboards

NOTE: This guide assumes you have access to a working OS X install- the fastest and easiest way to get the job done.

What you need:

• A Mac or Working Hackintosh running OS X Leopard or Snow Leopard
• If using a Mac an external hard drive enclosure or adapter
• A Snow Leopard Mac OS X Install DVD
• A USB stick 8gb or larger, or a USB hard drive
• Patience and humility- it may not work out perfectly the first time, but you will learn from your mistakes, and with enough tenacity the promised land can be reached.

STEP 1: PREPARING THE USB DRIVE
In this step, we must prepare a USB Drive to act as an installer for OS X. You may have installed an operating system before using a DVD. This is similar to installing using a DVD, but instead of the computer starting up and booting the DVD, it will start up and boot directly into an external USB drive with your modified OS X Installer DVD copied onto it.

1. Boot into your existing OS X Installation.
2. Insert your USB drive that you intend to use for booting the installer.
3. Open Applications/Utilities/Disk Utility.
4. Highlight your USB drive in the left column.
5. Click the Partition Tab.
6. Click Volume Scheme- choose 1 Partition.
7. Click Options…
8. Select GUID Partition Table. Click OK.
9. In the Name: field type: InstallDrive
10. In Format: field select Mac OS Extended (Case Sensitive, Journaled)
11. Click Apply, then click Partition.
12. Right click on InstallDrive in Finder or Desktop. Choose Get Info.
13. In the lower right corner, click the lock icon open, type your password and un-check Ignore Ownership on this Volume checkbox. Click the lock icon closed.
14. Insert Mac OS X Install DVD or mount Mac OS X Install DVD.dmg
15. Switch back to Disk Utility.
16. Highlight InstallDrive in the left column.
17. Click Restore.
18. Right click on Mac OS X Install DVD and choose Set as Source.
19. Right click on InstallDrive and choose Set as Destination.
20. Un-check Erase Destination checkbox.
21. Click Restore, click Restore again, and then type your password.

The DVD will now copy onto your USB drive. It should take less than 10 minutes to complete depending on hard drive speed, DVD speed, etc...

STEP 2: INSTALL CHAMELEON BOOTLOADER TO USB DRIVE
Chameleon is a bootloader. It is open-source software that you load onto your hard drive that loads first and enables your computer to recognize and boot into an OS X Startup Disk or USB Installer. Think of it as a middle ground between your BIOS and your Operating System. In this step you will install Chameleon to your USB Installer drive.

1. Download tonymacx86-snowleopard.zip.
2. Open and place tonymacx86-snowleopard folder on the desktop.
3. Open Apps folder
4. Open PC EFI 10.1
5. Select InstallDrive and click Continue.
6. Click Install, and then type your password.

STEP 3: COPY NECESSARY FILES TO USB INSTALLER DRIVE
In this step, you will copy the boot file, DSDT.aml, and Extra folder from tonymacx86-snowleopard to Snow Leopard. You will also delete the 10.6.0 (10.0.0) Vanilla kernel and drop in the 10.6.0 (10.0.0) Qoopz Voodoo kernel. This is necessary because in OS X Snow Leopard 10.6.0-10.6.1, P55 based systems are not supported- the Qoopz kernel allows P55 support. The boot file is a modified version of Chameleon 2.0 RC3 (PC EFI v10.5!) which includes support for P55 motherboards and i5/i7 1156 processors. If you don’t install this file, the system clock will run too fast causing system-wide problems. The DSDT.aml is a modified version of the instructions that the computer sends to the Operating System which helps the OS recognize devices properly. The one included has fixes for CMOS reset, USB, and HD Audio.
The Extra folder contains com.apple.boot.plist, Extensions Folder, Extensions.mkext, and smbios.plist. apple.com.boot plist is a file which allows you to give Chameleon commands, select alternate kernels, give the system boot commands, etc… The smbios.plist contains information that identifies your computer to OS X. The Extensions Folder contains kexts (kernel extensions) that by default reside in System/Library/Extensions. Extensions.mkext is a cache of all of the kexts in your Extensions folder. At boot, the system loads the cache files located in /Extra/Extensions and /System/Library/Extensions. (/Extra/Extensions.mkext and /System/Library/Extensions.mkext) respectively.

1. Open Applications/Utilities/Terminal
2. Type: sudo rm /Volumes/InstallDrive/mach_kernel and type your password. (this deletes the stock Kernel)
3. Type: sudo rm /Volumes/InstallDrive/boot and type your password. (this deletes the boot file installed from PC EFI 10.1)
4. Close Terminal.
5. Set up Windows as shown in the photo below.
6. Click and drag boot, DSDT.aml, and Extra from tonymacx86-snowleopard to InstallDrive. (boot will become invisible when moved to Snow Leopard)
   
7. Open Qoopz Voodoo kernel for 10.6.0 & 10.6.1 folder.
8. Drag mach_kernel to InstallDrive.

STEP 4: PREPARE SNOW LEOPARD HARD DRIVE
Now you need to format your destination hard drive (Snow Leopard) to accept the installation by your InstallDrive. I strongly recommend using a SATA drive.

1. Open Applications/Utilities/Disk Utility.
2. Highlight the hard drive you want to use as the destination for your actual Snow Leopard Install in the left column.
3. Click the Partition Tab.
4. Click Volume Scheme- choose 1 Partition.
5. Click Options…
6. Select GUID Partition Table. Click OK.
7. In the Name: field type: Snow Leopard
8. In Format: field select Mac OS Extended (Journaled).
9. Click Apply, then click Partition.
10. Close Disk Utility.
11. Right click on Snow Leopard in Finder or Desktop. Choose Get Info.
12. In the lower right corner, click the lock icon open, type your password and un-check Ignore Ownership on this Volume checkbox. Click the lock icon closed.
13. Shut down computer.
14. Remove all hard drives except InstallDrive and Snow Leopard.

STEP 5: CHANGE BIOS SETTINGS
In order for your computer to boot directly into the external USB OS X Installer that we just created, you must change your BIOS settings in CMOS Setup Utility. The BIOS is set up by default to load any SATA or IDE drives before USB drives. Now is a good time to load the Optimized Defaults in the BIOS if you haven’t already, and then make the necessary changes as shown in the pictures.

1. Turn on computer, and tap Delete key repeatedly- wait a few seconds for the computer to load CMOS Setup Utility.
2. Click Load Optimized Defaults and accept.
3. Click Advanced BIOS Features.
4. Click Hard Drive Priority.
5. Move USB Drive to top of list by highlighting it and hitting PAGE UP.
6. Press Escape to get back to Menu.
7. Match your settings to the pictures below.
8. Click Save & Exit Setup and accept.

STEP 6: BOOT FROM USB DRIVE AND INSTALL OS X
Upon this restart, the USB Installer will boot using Chameleon boot loader. You should see the PC EFI v10.5 logo, the InstallerDrive and a blue countdown ribbon. It will boot on it’s own- you don’t need to do anything. The com.apple.boot.plist in /Extra contains the kernel flag –v which allows you to watch as the system loads the files that run OS X. If you want to view an apple logo with a spinning wheel, you can remove it later. It is easier to see what’s wrong if you watch the boot sequence.

1. Follow the steps of the OS X Installer to install OS X to Snow Leopard.
2. After the installation is finished, don’t restart. Turn the power button off without shutting down.
3. Remove USB InstallDrive and turn on computer.

STEP 6.5: ALTERNATE METHOD (OPTIONAL)
If you used a Mac laptop & external enclosure to prepare the InstallDrive, and do not have an existing OS X install on your P55 machine, you may find the following alternate method easier. Instead of booting into an existing install to copy the mach_kernel, you can use the OS X Installer's Terminal to copy the kernel to Snow Leopard.

1. Boot back into InstallDrive with Snow Leopard attached.
   
2. Go to Utilities/Terminal
3. Type: rm /Volumes/Snow\ Leopard/mach_kernel
   
4. Type: cp /mach_kernel /Volumes/Snow\ Leopard/
5. Reboot
   
6. Boot back into InstallDrive, then pause Chameleon countdown and select Snow Leopard
7. Proceed to STEP 9, then install Chameleon, /Extra, boot, & DSDT.aml following STEP 7 & 8 and the rest of the guide directly from Snow Leopard installation.
   

STEP 7: INSTALL CHAMELEON TO SNOW LEOPARD DRIVE
After installing, the computer will restart. Boot into your working install to replace files and install Chameleon to your Snow Leopard hard drive. This is the exact thing you did to the USB Installer drive earlier. In this step you will install Chameleon to your Snow Leopard hard drive.

1. Boot back into your existing OS X Installation.
2. Open Apps folder
3. Open PC EFI 10.1
4. Click Continue, then Change Install Location…
5. Select Snow Leopard and click Continue.
6. Click Install, and then type your password.

STEP 8: COPY NECESSARY FILES TO SNOW LEOPARD DRIVE
In this step, you will copy the boot file, DSDT.aml, and Extra folder from tonymacx86-snowleopard to Snow Leopard. You will also delete the 10.6.0 (10.0.0) Vanilla kernel and drop in the 10.6.0 (10.0.0) Qoopz kernel.

1. Open Applications/Utilities/Terminal
2. Type: sudo rm /Volumes/Snow Leopard/mach_kernel and type your password. (this deletes the stock Kernel)
3. Close Terminal.
4. Set up Windows as shown in the photo.
5. In Snow Leopard, drag Extra to trash. Type your password.
6. Click and drag boot, DSDT.aml, and Extra from tonymacx86-snowleopard to Snow Leopard.
7. Open Qoopz Voodoo kernel for 10.6.0 & 10.6.1 folder
8. Drag mach_kernel to Snow Leopard

STEP 9: FIRST BOOT
The first boot of your new Snow Leopard install will show you a video and then lead you through a standard OS X setup routine for a new Mac.

1. Complete the OS X setup routine.
2. When you finally get to the desktop, restart the computer. This helps set initial boot caches.

STEP 10: INSTALL ADDITIONAL KEXTS TO SYSTEM/LIBRARY/EXTENSIONS
There are a few kexts that you can’t use in /Extra/Extensions. These include Ethernet kexts. Also, you’ll need to create new cache files any time you remove or replace kexts. There are a few invaluable programs to allow you to do these tasks effortlessly. They are Kext Utility and Kext Helper b7. You can do all of the things in Terminal, but these apps make it easy and foolproof.
Open tonymacx86-snowleopard Apps folder.

1. Drag Kext Utility and Kext Helper b7 to your Applications folder.
2. Open Kext Helper b7.
3. Drag RealtekR1000SL.kext (or Intel82566MM.kext if you have an Intel Motherboard) from System – Library – Extensions into Kext Helper b7.
4. Type your password and click EASY INSTALL.
5. Close Kext Helper b7.
6. Open Snow Leopard drive.
7. Drag /Extra/Extensions folder onto Kext Utility application. (This will repair permissions on the folder, backup your cache file, and replace cache file with an updated one.)
8. Drag /System/Library/Extensions folder onto Kext Utility application.
9. Open Applications/Utilities/Disk Utility
10. Highlight Snow Leopard in the left column.
11. Click Repair Permissions.
12. Restart computer.

STEP 11: UPDATE TO 10.6.2
Upon the release of Mac OS X Snow Leopard 10.6.2, and the 27" Intel Core i5 and i7 iMacs, OS X Snow Leopard supports P55 based systems. This means that you can update without worrying about putting the Qoopz kernel back in. The update will install the 10.2.0 Vanilla Kernel, as well as a host of security and stability fixes. Details are available on Apple’s website.

1. Download the Mac OS X 10.6.2 Combo Update here:
http://www.apple.com/downloads/macosx/apple/macosx_updates/macosxv1062updatecombo.html
2. Drag your /System/Library/Extensions folder to the desktop. You may need some of the 10.6.0 Extensions later. It’s always good to have a backup before any ‘point’ system update.
3. Right click and rename the folder 10.6.0 Extensions.
4. Mount MacOSXUpdCombo10.6.2.dmg
5. Install MacOSXUpdCombo10.6.2.pkg

OPTIONAL INSTALLS:
The following step is optional- you may now be finished!

STEP 12: ENABLE QUARTZ EXTREME AND CORE IMAGE (QE/CI)
This step is necessary only if you don't have the full power of your graphics card already. By default, the com.apple.boot.plist has GraphicsEnabler=Yes selected, and should work for most cards. You can test if you have QE/CI enabled by pressing F12 (Dashboard) and trying to add a widget. If you see ripples, you have QE/CI enabled.
This step allows OS X to fully recognize and enable the power of your graphics card, like a driver. If you have an nVidia graphics card, you can also use NVEnabler 64.kext which is located on the tonymacx86-snowleopard folder in System-Library-Extensions. This kext is known to solve issues with TV-out.

1. Open tonymacx86-snowleopard.
2. Drag NVEnabler 64.kext from System – Library – Extensions into Kext Helper b7.
3. Type your password and click EASY INSTALL.
4. Close Kext Helper b7.
5. Open Snow Leopard drive.
6. Drag /Extra/Extensions folder onto Kext Utility application.
7. Drag /System/Library/Extensions folder onto Kext Utility application.
8. Open Extra folder
9. Drag com.apple.boot.plist to desktop.
10. Double click to open in TextEdit
11. Remove the GraphicsEnabler=yes line.
12. Drag the edited com.apple.boot.plist back to Extra folder.
    
13. Open Applications/Utilities/Disk Utility
14. Highlight Snow Leopard in the left column.
15. Click Repair Permissions.
16. Restart computer.

YOU’RE DONE!
One final note. This is how I got my system working. If I find a way without replacing any old kexts, I’ll certainly let you know. I’m working on enabling sleep for this motherboard, and I will post a method if I come across a solution.

If you’re having issues with any component, most likely graphics if you have an ATI card, know that there are many ways to enable graphics. Most likely there is a solution that can be found. I may be able to help you if you post your issue in the comments to this post. Thanks for reading and I hope it worked for you! Special thanks goes out to the entire OSx86 Hackintosh community! This guide was cobbled together from various sources- I did not invent this method, and do not wish to take any credit beyond putting it into plain English. ;)

-tonymacx86

PS: If you want to enable the Apple Boot Screen on startup, read this post:
http://tonymacx86.blogspot.com/2009/11/enable-apple-boot-screen.html

EDIT #1 (2009-11-17): tonymacx86-snowleopard.zip now contains a modified version of PC EFI v10.5 for P55 Boards! This means ATI users can now use GraphicsEnabler=Yes flag in com.apple.boot.plist. I updated the com.apple.boot.plist to include this flag by default. Therefore, you may not have to use NVEnabler 64.kext anymore either. I made a few changes to the guide accordingly. Unfortunately I don't have an ATI card to test. I believe both nVidia and ATI cards will now be fully enabled by default by using this guide. For further ATI solutions, check out this post on netkas' blog.

EDIT #2 (2009-12-07): If you're having trouble booting, it may be the 10.6.0 Qoopz kernel. Replace each reference of the Qoopz kernel in the above guide with the Vanilla 10.6.2 kernel. Also, I added an optional STEP 6.5 specifically for users who do not have an existing Hackintosh install on their P55. After installation, instead of booting into an existing install to copy the mach_kernel, you can use the OS X Installer's Terminal to copy the kernel to Snow Leopard.

EDIT #3 (2010-01-23): Removed the following section due to new edits of the GA-P55M-UD2 DSDT. The updated version is now included by default in tonymacx86-snowleopard.zip.

STEP 12: REPLACE FILES AND REBOOT
This step is necessary if using the LegacyHDA_ALC888B.kext in the Extra folder for audio. You must replace the 10.6.2 AppleHDA.kext with the one from 10.6.1. Because this guide skipped 10.6.1, I included it in tonymacx86-snowleopard. You may use something else such as VoodooHDA.kext, and you’ll never have to replace anything, but I prefer this one as it maps the ins and outs directly for the UD2 motherboard. **Most likely the kext will be updated and this step will become unnecessary. (2010-01-23)

1. Open tonymacx86-snowleopard.
2. Drag AppleHDA.kext from System – Library – Extensions into Kext Helper b7.
3. Type your password and click EASY INSTALL.
4. Close Kext Helper b7.
5. Open Snow Leopard drive.
6. Drag /Extra/Extensions folder onto Kext Utility application.
7. Drag /System/Library/Extensions folder onto Kext Utility application.
8. Open Applications/Utilities/Disk Utility
9. Highlight Snow Leopard in the left column.
10. Click Repair Permissions.
11. Restart computer.

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