Preparing for 10.5.6 update.

Warning, this information is only for users who can use vanila kernel.

Next macosx update, 10.5.6, will require you to do few things before installing it.

First, you need to install pc evi v9 or any other boot-132 with mackerintel’s dsdt patcher.

if you had chameleon or etc, and have file named “boot” in root of your active partition, then just replace it with v9 or other bootloader.

second, very important, you need to generate fixed dsdt and place it to root of your osx partition (of the osx you will update).

TO do it use DSDT patcher from fassl .

if all went fine, then your 10.5.5 osx should be working still.

So now you can safely update to 10.5.6 , even no need to remove appleintelcpupowermanagement.ket durring installing, if dsdt patcher made it’s job good.

P.S. its better to remove appleintelcpu…kext after update is done, because it will heatup ur cpu

P.S.S. if you use /Extra mkext and placed dsmos/appledecrypt/etc there, then you dont need to edit any scripts after update is done and before reboot, so this update will go like on macs, if u made all preparations.

 IMPORTANT UPDATE: after fixing dsdt and before installing 10.5.6, you HAVE to install either PM disabler or Appleintelcpupowermanagement.kext from 10.5.5 here

otherwise u will have freeze durring installation, because new appleintelcpu… will get loaded, and this new kext isnt compatiblw with 10.5.5. 


  1. Jeffster
    December 28th, 2008 | 6:17 am

    {generic i’m a noob explanation goes here}
    Okay, so I’m going to say what I did step by step (on 10.5.5)
    First, I dloaded the pcefi boot file and copied it into root with:
    sudo cp boot /
    then, i went and grabbed the dsdt patcher courtesy of netkas’s link, unzipped and ran the little executable, typed 0 at the prompt that asked you which OS to emulate then:
    sudo cp dsdt.aml /
    after that, i rebooted and everything worked fine 🙂
    ( on ten.five.five, at least.
    can anybody verify that it is okay to install teh update at this point

  2. cybaster
    December 30th, 2008 | 8:34 am

    Hi, Regarding the mkext I have a few questions. My rig is up and running with PC+EFIv9 and DSDT patched.
    I found that a driver package installed dsmos.kext, disabler, and other kexts in /System/Library/Extensions. This however defeats the purpose of my Retail DVD install.
    I want to move those kexts back to /Extra but I am still a little confused about the mkext.

    First off, do i have to replace the boot file with that of the boot-123 bootdisk? (i assume not because PC+EFIv9 should take care of it).

    Second is that should i create a /Extra/Extensions folder, or should I have the kexts directly in /Extra?

    Finally, if the kexts can be in the /Extra/Extensions folder, why would I need to make the mkext? if I make the mkext, would that load automatically in /Extra?


  3. Stanislas
    January 4th, 2009 | 9:56 am

    Is it possible to update straight from 10.5.2 vanilla to 10.5.6 using above mentioned instructions?

  4. Andrew
    January 6th, 2009 | 5:09 am

    Hi, Thank you for all this work!

    I was using the install by mystius C on, of Leopard. Since I was using the vanilla kernel just fine, I thought I could download and use Apple’s 10.5.6 combo update. I did look at some of the forums and followed instructions to create the DSDT file, and yet my system now crashes. I am proficient with computers but a noob at this, and made the stupid mistake of only having everything backed up through Time Machine. So I cannot boot now. I can get past the hang where it says “waiting for root device” by naming the drive when the chamelon / darwin loader starts up, but then I get a kernel panic I don’t understand. I wish I could take something like your iso and install it over my current non-functional installation, but your instructions say not to do this.

    Is there anyone who can help me? I’d be happy to take a screen shot of the kernel panic, or follow any other instructions… would prefer to not have to start all over and do not have experience with whether Time Machine can fully bring me back to where I was before the 10.5.6 Combo Update. I have Time Machine use a separate drive though.

    My computer is a Dell 530 Intel Core 2 Quad with 6 G of Ram, and my OS X86 is on a separate internal hard drive.

    Thanks! Andrew

  5. reztirps
    January 8th, 2009 | 2:32 am

    Thansk for the tips, I followed the instructions and everything went smoothly. The only thing now is that whenever I try to mount a dmg I get a kernel panic. I have already tried using the 10.5.5 seatbelt.kext, but it made no difference. Does anyone know how to fix this? Thanks in advance!

  6. diego
    January 8th, 2009 | 6:56 pm

    excuse I have a problem with the DSDT PATCH just finished installing the patch tells me installazion complete or something like that and then immediately build failed! log can be found at sessions /
    I write on the blog because after this passage of DSDT PATCH I tried to upgrade and I was overwritten my internships XNU kernel 9.4.0.

  7. oimetoim
    January 11th, 2009 | 5:51 pm


    one thing; I cant find is the pm disabler or the appleintelcpupowermanagement.kext from 10.5.5 where are they ?
    and where do I need to put the kext to stop the installer from crashing qt 68-72%
    Thanks a lot.
    I m on a gigabyte ga-p35-ds3l

  8. vele
    January 14th, 2009 | 9:44 pm

    Thanks Netkas it works.

    Also thanks falcon I followed your 1st paragraph and it worked. Just had to download ps2 fix

  9. treschny
    January 26th, 2009 | 9:47 am

    reztirps – I have this same problem now as what you’ve described above. Did you figure it out?


  10. John Smith
    February 2nd, 2009 | 11:06 pm

    DSDT patch seems to be unnecessary as of 10.5.6:

    netkas must have been misleading public by playing with beta 10.5.6 update

    netkas, would you be fancy to edit your blog entry?

  11. Vincent
    February 6th, 2009 | 6:22 am

    I am running 10.5.6 on an ASUS rampage MB with Vanilla following the instructions from this blog.
    Everything works great except for ONE thing.
    Every time I put a CD or DVD in the IDE drive the system panics and represents itself through a gray screen with the polite recommendation to reboot. After rebooting the OS, the inserted CD or DVD works just fine.

    Does anybody experienced a similar issue and know how to solve it?

  12. avian
    February 23rd, 2009 | 5:45 pm

    Just want to second the question on intel-vt thats above. A lot of really pathetic bios’s leave VMX/Intel-VT disabled by default even if the cpu supports it. Any chance of a future PC_EFI release giving the option to enable VMX/Intel-VT via a flag or something?

    I’ve seen a good number of posts with people in the same situation on insanelymac, definitely a future that would be appreciated.

  13. Dolcezeus
    May 6th, 2009 | 7:16 pm

    hi! i read tha i have to remove appleintelcpupowermanagement but i don’t find it…
    i use pc efi v9+ chameleon than i use dsdt patcher..than i have update with not problem but now i don’t find the kext is it in S/L/E??
    Please answere me.

  14. psychodude
    June 13th, 2009 | 5:02 am

    ok this has been asked in post 53
    well i run kalyway 10.5.2
    i tried ur method and got a kp
    so can you please guide me netkas?
    can i update it straight to 10.5.6
    or even to 10.5.7?

  15. psychodude
    June 13th, 2009 | 5:03 am

    oh i use vanilla kernel btw

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