This guide is for upgrading your existing Snow Leopard or Lion installation to Mountain Lion on the ASUS Sabertooth P67 (though it will likely work for a lot of other boards). The method described here seems to be the “old fashioned” way of creating an OS X installer drive, but it still works. There are tools out there that make this process much quicker, such as TonyMacx86′s UniBeast.
Disclaimer: I am not responsible if you lose data or if you somehow destroy your computer in the process.
1. Back-up anything important. This is optional but highly recommended.
2. Download Mountain Lion from the App Store. When the download finishes, right-click on the icon and click “Show Package Contents.”
3. Open the “Contents” folder, then open “Shared Support.” Open “InstallESD.dmg.”
4. Open terminal, and type “defaults write com.apple.Finder AppleShowAllFiles TRUE”, press enter, type “killall Finder” and press enter.
5. You should have a disk image mounted named “Mac OS X Install ESD.” Open that in Finder and open “BaseSystem.dmg.”
6. Open Disk Utility, click on the drive you wish to add a partition to, click the partition tab, and resize a partition. Click the plus icon at the bottom to add another partition. Make sure it’s formatted as Mac OS Extended (Journaled). Click apply.
7. Click on “Mac OS X Base System” on the left side, and click on the “Restore” tab. Make sure “Mac OS X Base System” is set as the source, and then drag the partition your created in step 6 to the destination box. Click the restore button.
8. Drag “mach_kernel” from Mac OS X Install ESD to Mac OS X Base System (make sure it’s the partition, not the disk image”. Then drag the Packages folder to /System/Installation on the Base System drive.
9. Add FakeSMC.kext to /System/Library/Extensions on Base System. (Also, at this point in time you need to delete ATI6000Controller.kext if you’re using a Radeon HD6000 series graphics card. If you don’t you may get stuck at a blank white screen when you boot.)
10. Install Chimera to a flash drive or your Base System partition if necessary. Reboot, install, and install whatever options you need from MultiBeast. Here are the options I used:
- System Utilities
- AppleHDA Rollback
- Non-DSDT HDAEnabler ALC892
- FakeSMC Plugins (Optional; delete IntelCPUMonitor.kext if you install this)
- hnak’s AppleIntelE1000e Ethernet (I haven’t tested this but it should work)