12 Replies Latest reply: Sep 18, 2014 7:33 AM by jayparks41
nnaattiiee Level 1 Level 1

Really need someones help on finding what is the problem with my little Macbook...

I have had no problems whatsoever over the past year, until I loaded it up on the other morning and the dreaded kernel panic screen popped up.

I was hoping it was a software problem but even after erasing the hard drive, reinstalling the system and updating, it's not solved. The crash report is below, any help on deciphering it will be greatly appreciated! Also I can boot up fine in safe mode...



panic (cpu 0 caller 0x563ebd) : "Unable to find driver for this platform :

\ "ACPI \ ". \ n"@/ SourceCache / xnu / xnu - 1504.15.3 / iokit / kernel / IOPlatformExpert.cpp : 1387

Debugger called : <panic>

Backtrace (cpu 0) , Frame : Return Address (4 potential args on stack)

0x79f93da8 : 0x21b837 (0x5dd7fc 0x79f93ddc 0x223ce1 0x0)

0x79f93df8 : 0x563ebd (0x5e71ac 0xb916500 0x79f93e28 0xb97f640)

0x79f93e18 : 0x543f60 (0xb978d00 0xb978d80 0x1 0x506b76)

0x79f93e78 : 0x542137 (0xb978d80 0xb978d00 0xb97f680 0x50aa3e)

0x79f93f28 : 0x5426e9 (0xb978d80 0xb97f740 0x8 0xffffffff)

0x79f93f78 : 0x5443d5 (0xb978d80 0x0 0x79f93fac 0x1)

0x79f93fc8 :0x2a179c (0xb9165c0 0x0 0x56803fe9 0xad007fd2)


BSD process name corresponding to current thread : Unknown


Mac OS version : Not yet set


Kernel version : Darwin Kernel Version 10.8.0 Tue Jun 7 16.33.36 pm


System uptime in nanoseconds : 239533251

MacBook, Mac OS X (10.6.8)
  • ds store Level 7 Level 7

    All I can suggest is try a hardware check


    Instructions: Apple: Hardware Test



    ..Step by Step to fix your Mac

  • nnaattiiee Level 1 Level 1

    Tried the hardware check which didn't work, which the instruction page says is because I need the Mac OS X install disc 1...

    ...Unfortunately I don't have the original installation discs bought it from a classmate at uni and it was her brothers and he lost/threw them away with the box back when he bought it new... blah blah etc


    Is there any other way I can do this check or find out what is causing the panic?


    Forgot to add the spec before, so here it is:

    Macbook 13" Unibody 2.4ghz Intel Core 2 Duo 250gb upgraded to 8gb

  • ds store Level 7 Level 7

    Take the machine in to the closest Apple Store and they will evaluate it.


    You can call Apple to get a replacement boot disk.

  • nnaattiiee Level 1 Level 1

    Thanks for the advance I rang apple and they are sending me replacement disks, if that doesn't work I'll have to go to my nearest apple store which isn't so near...


    Just one more question!

    I just read your 'step by step to fix your mac' and came across the section on 'What you will need if on 10.6'

    I was planning on buying my own copy of OS X Snow Leopard 10.6 as a borrowed one to do the reinstall. Would I still be able to get machine specific 10.6 for my machine or would I have to get the retail version?


    Cheers for the replies your short to the point answers have been very helpful

  • WZZZ Level 6 Level 6
    Mac OS X

    If you reinstalled any third party applications after doing the erase and install, these might be causing the KPs. A reinstall in that case won't prove it isn't software related.


    If you don't have the Snow Leopard Install DVD, how did you reinstall? You reinstalled 10.8?


    Is there more to the panic log than that? If so, can you post the full log.


    You appear to be running 10.8, why then do you want to install Snow Leopard?


    What replacement discs is Apple sending? As replacements, they would be sending the grey machine specific discs that originally came with the computer.

  • nnaattiiee Level 1 Level 1

    No I haven't reinstalled anything after doing the erase and reinstall accept the software updates from apple.


    As I said before I borrowed a OS X Snow Leopard 10.6.3 to erase the hard drive and reinstall the system, I just wanted some advance on purchasing my own because I was just going to purchase the retail version from the online store.


    The full log is there at the top in my first post there is no more to it.


    I am running OS X Snow Leopard 10.6.8 which was originally 10.6.3 before updates.


    And yes, apple is sending me the grey machine specific discs that would have come with the MacBook when it was bought new 4/5 years ago.

  • WZZZ Level 6 Level 6
    Mac OS X

    Might try reseating the RAM. RAM is a likely culprit with KPs. You can trust a positive, but the Hardware Test isn't a very reliable diagnostic for negatives. You could run it a few times in extended.

  • nnaattiiee Level 1 Level 1

    Ok thanks, will give that a go in the mean time. The discs are being sent free of charge, so they'll just be an added bonus from all this - it's always bothered me that I didn't have them.

    Also, it might be a stupid question, but what do you mean by 'you can trust a positive but the hardware test isn't reliable... etc'?

  • WZZZ Level 6 Level 6
    Mac OS X

    Just that the Hardware Test isn't really great at finding errors, which is to say it isn't great at diagnosing. So if it comes back empty handed (a negative), that doesn't mean nothing is wrong. But if it reports an error (a positive) it can be trusted.


    If you can boot the computer and get on the Internet to download memtest, it would run a better check on the RAM than the AHT. But even there, as RAM errors are known to be elusive and random, it might take a fair number of loops to find anything.


    So, in case you can:


    To test the memory, get memtest and run it in single user mode, where it will test as much memory as possible, more than with the OS loaded.


    You can get memtest + directions from the link below. However, ignore running it from Terminal. Instead, boot into SU Mode, CMD-S at the startup chime. (Best to startup from a full shutdown.)


    At the prompt, simply type /usr/bin/memtest all 3 -L (From this link It will be installed in /usr/bin/) Then hit return. This will run three loops of memtest and create a log in Console in Utilties. The log may also appear in the Hard Drive Folder (Macintosh HD, unless you have renamed it), which is either on your Desktop or in the sidebar of a Finder window.


    If you want to run memtest longer, which may be advisable, since RAM errors can be very elusive, you can change the number of loops it runs by changing the number. For example, to run 8 loops you would enter /usr/bin/memtest all 8 -L.


    If you want to quit the test at any time, just hit control-c


    When finished, you can just type in "reboot" and hit return.




    Direct link for the download.






    Here is an Apple article that shows how to get at the RAM on a MacBook




    Message was edited by: WZZZ

  • nnaattiiee Level 1 Level 1

    I've tried reseating the RAM with no luck


    I downloaded the memtest and tried to boot in SU mode to run it. It starts up in the mode then a similar kernel panic (there's a few extra lines to it) pops up in the SU mode - black screen white text - without the restart prompt.


    I'm doing the check now by running it through the terminal, so far it hasn't come up with anything but the requested, avaliable and allocated memory is 2069mb when there is 8gb installed might this mean that the other 6gb is causing the kernel panic?

  • WZZZ Level 6 Level 6
    Mac OS X

    It's not that the other 6GB is responsible for the KPs--and I'm kind of confused about this myself, and will have to do some more research as to how to get memtest to test all the RAM. (I believe memtest was developed before RAM capacities became so large.)


    On all other systems, memtest executes in 32-bit mode with a maximum testable limit of 2 GB.



    It might be that it tests incrementally more of the RAM on subsequent passes. But don't really know. I will have to look into this.


    It does sound like you need to bring the MB in for a proper, professional diagnosis.

  • jayparks41 Level 1 Level 1

    i have this issue also,im hoping if i reinstall the system it will resolve the problem,only i dont have the install disc & dont want to purchase it only to find no joy? how did you go with your mac?? fixed or replaced if fixed,mind telling me what had to be done