7 Replies Latest reply: Aug 9, 2013 11:29 AM by andyBall_uk
Lyra_real Level 1 (0 points)



I have searched several places where there are similar discussions but most of them are on high level hardware requirements. It seems that there is a kernel issue due to which I cannot upgrade - so please help me figure out 2 key questions with regards to upgrading.


My system's hardware and software details are as follows:


Hardware Overview:


  Model Name:          MacBook

  Model Identifier:          MacBook3,1

  Processor Name:          Intel Core 2 Duo

  Processor Speed:          2 GHz

  Number Of Processors:          1

  Total Number Of Cores:          2

  L2 Cache:          4 MB

  Memory:          2 GB

  Bus Speed:          800 MHz


Software Overview:

  System Version:          Mac OS X 10.6.8 (10K549)

  Kernel Version:          Darwin 10.8.0

  Boot Volume:          Big Brain

  Boot Mode:          Normal

  64-bit Kernel and Extensions:          No


From this kb support article, I have a 64 bit processor;

I am running Mac OS X 10.6.8 and majority of the extensions under my software menu are 'yes' - meaning my kernel is compatible to a 64-bit mode, but is currently running in 32-bit mode.

Following this kb advice, I switched my kernel architecture to 64-bit through terminal. But on checking again, it really offers only 32-bit mode (I386 i386)


See Terminal script:

Marceau-2:~ Bee$ sudo systemsetup -setkernelbootarchitecture x86_64

setting kernel architecture to: x86_64

changes to kernel architecture have been saved.

Marceau-2:~ Bee$ uname -a

Darwin Marceau-2.local 10.8.0 Darwin Kernel Version 10.8.0: Tue Jun  7 16:33:36 PDT 2011; root:xnu-1504.15.3~1/RELEASE_I386 i386

Marceau-2:~ Bee$


Is there a way to switch my kernel architecture to 64-bit so that I can upgrade to OS X 10.7 and then to Mountain Lion? I went to the apple store in person, but the staff wasn't able to help. I am a big fan of my Macbook 3.1 and want to be able to upgrade its OS alongwith understanding how it works - I would very much appreciate if you could point me in the right direction:


- From this ars technica article, it seems the key challenge is overcoming the hurdle of kernel not being 64-bit; so how can I make my kernel compatible or upgrade it?

- Once I have done that, I plan to upgrade RAM to 4GB so that I can run Mountain Lion. Is that the only hardware upgrade I require?


Thank you very much in advance!


Message was edited by: Lyra_real

MacBook, Mac OS X (10.6.8), Kernel 64bit, 2 GB RAM