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64 Bit and 32 Bit Snow Leopard

A friend of mine just purchased a current 17" Macbook Pro (Core i5 2.53GHz, Mac OSX 10.6.4).

He also purchased an Mbox 2 with Pro Tools LE 8, with the intent of using it with the new Macbook Pro. I came by his place to help him install the software and get up and running.

I instantly ran into problems upon trying to boot Pro Tools. While loading the included plugins, I received error after error. I have yet to head over to Digidesign's website and do a search for the particular error code but I already have a good idea as to where the problem lies.

My guess was that it was a 64 Bit/32 Bit compatibility issue.

I launched Activity Monitor and sure enough, the Finder was listed as running in 64 Bit mode. Pro Tools is not 64 Bit compatible, I know this for a fact.

I have heard of people forcing their Mac to boot into the 64 Bit Snow Leopard kernel. It seems like this machine does it by default.

My answer was to force it to boot into 32 Bit mode.

I followed the steps found here to try and force the machine to boot with the 32 Bit kernel:

http://support.apple.com/kb/HT3773

However, I could not get the Mac to boot into 32 Bit mode. Holding "3" and "2" during the boot sequence didn't do it. Executing the sudo command from the Terminal didn't do it.

So, the question is:

Why can I not force this machine to boot 32 Bit? All of the drivers and kernel extensions installed with Pro Tools are 32 Bit. Nothing works right now.

Is it possible that the new Macbook Pros only run in 64 Bit mode?

Posted on Nov 12, 2010 9:41 PM

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1 reply

Nov 12, 2010 10:22 PM in response to Mike Ayotte

Mike Ayotte wrote:
A friend of mine just purchased a current 17" Macbook Pro (Core i5 2.53GHz, Mac OSX 10.6.4).
the 64 Bit Snow Leopard kernel. It seems like this machine does it by default.



Mike Ayotte- You can verify your suspicions by looking at the Sys Profiler.

Apple() --> About this Mac --> More info --> Software

*System Software Overview:*

+64-bit Kernel and Extensions+:
No if it is boot into 32-bit,
Yes if it is booted 64-bit

I do not believe any Macboook/MacBookPro is set to default into 64-bit boot.

http://www.apple.com/macosx/technology/

Some Mac Pro's are shipping 64-bit by default, you can read more here:
http://support.apple.com/kb/HT3770
http://support.apple.com/kb/HT3773

hope this helps

Message was edited by: leroydouglas

64 Bit and 32 Bit Snow Leopard

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