Updating Theory, Aka "Prevent bad stuff when you update"
Feb 20 2009, 03:05 AM
Leopard only.
The current practice and theory behind Updating OSx86 Leopard is based on the following.
There exists in the world of OS X certain kernel extensions which serve no practical purpose for "PC's" as they are more commonly referred to, notably "AppleIntelCPUPowerManagement.kext", and to a lesser degree some other kexts such as "AppleRTC.kext".
These kexts can cause problems with OSx86 machines by most often causing a kernel panic, and so for legacy purposes, the way of getting around this was to run a small shell command:
CODE
sudo while sleep 1; do rm -rf /System/Library/Extensions/AppleIntelCPUPowerManagement.kext; done
which just constantly checks for the above mentioned kext, and if it finds it, deletes it before it has a chance to be loaded by the OS.
This was a quick and dirty hack, but it worked.
Then somewhat more advanced methods were developed, still in use today, such as the use of a Disabler.kext (IntelCPUPowerManagementDisabler.kext and the like) and most recently the Voodoo kernel have built in disabling capabilities of these damaging kexts, and that is the currently accepted method.
If however, you have already installed the update and you've hosed/b0rked/otherwise maligned your system voilà the original words from Hagar:
QUOTE (Hagar Sep 20 2008 @ 12:58 PM)
Here's an alternative method, in case anyone's interested in trying it. You do so at your own risk, etc, I may well have made some mistakes on the way. tongue.gif
1: boot the install DVD & remove AppleIntelCPUPowerManagement.kext as above to allow you to boot.
2: make sure you have chameleon installed, if not, get it from: http://tinyurl.com/5m66sf and install it to your os x drive
3: download "lifeboat 13" from http://www.mediafire.com/?mz2jwzwdzdy
4: in terminal type: sudo mv /boot /boot_old
5: unzip the contents of lifeboat 13 & drop the folder "Extra" and the file "boot" onto the root of your harddrive
'
6: reboot & run the downloaded update again.
What this does is place a decryptor & a disabler in /Extra/Extensions and a boot file that will load them on your harddrive. This in turn will help update-proof your system.
________________________
If you already have chameleon installed, it is possible to shorten the whole process by putting the contents of lifeboat13 on a usb stick or similar accessible device and copy the files onto the root of your harddrive from terminal whilst booted from the DVD, ideally moving /boot somewhere safe in case of need.
________________________
All the above is derivative of the work of others and is to be used at your own risk. If you don't understand it fully, or any step fails, try something else.
Chameleon is by Zef, boot-132 is by DFE, the kexts are by their various authors whom I fail to remember (if it's yours & there is an issue, please PM me)
1: boot the install DVD & remove AppleIntelCPUPowerManagement.kext as above to allow you to boot.
2: make sure you have chameleon installed, if not, get it from: http://tinyurl.com/5m66sf and install it to your os x drive
3: download "lifeboat 13" from http://www.mediafire.com/?mz2jwzwdzdy
4: in terminal type: sudo mv /boot /boot_old
5: unzip the contents of lifeboat 13 & drop the folder "Extra" and the file "boot" onto the root of your harddrive
'
6: reboot & run the downloaded update again.
What this does is place a decryptor & a disabler in /Extra/Extensions and a boot file that will load them on your harddrive. This in turn will help update-proof your system.
________________________
If you already have chameleon installed, it is possible to shorten the whole process by putting the contents of lifeboat13 on a usb stick or similar accessible device and copy the files onto the root of your harddrive from terminal whilst booted from the DVD, ideally moving /boot somewhere safe in case of need.
________________________
All the above is derivative of the work of others and is to be used at your own risk. If you don't understand it fully, or any step fails, try something else.
Chameleon is by Zef, boot-132 is by DFE, the kexts are by their various authors whom I fail to remember (if it's yours & there is an issue, please PM me)
and you can find here my package installer version of his little tidbits, http://spotlight.hopto.org/lifeboat13.zip, very useful for preventing bad updates from occuring, also useful is coupling this method with prelinking your kernel beforehand.
Enjoy and good luck
[work in progress]
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