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You are here: MacNN Forums > Software - Troubleshooting and Discussion > Mac OS X > Booting in 32-bit mode?

Booting in 32-bit mode?
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Mac Enthusiast
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Aug 31, 2011, 10:06 AM
 
Greetings.
I am doing some troubleshooting for a research application that is not functioning properly since the developers updated to a new version.

They have asked me to boot in 32-bit mode to troubleshoot.

How do I do that on a Pro MacBook?

This is the March 2011 release. I am using Mac OS X 10.7.1.
This one time, at Boot Camp, I stuck a flute up my PC.
     
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Aug 31, 2011, 10:52 AM
 
Hold the 3 and 2 keys during boot.
MacBook 2.0GHz CD; MacBook Pro 15" 2.4GHz Late '08; PowerMac G4 MDD Dual 1GHz; 3x Xserve G4 1GHz; Mac Mini 2GHz; Big pile of broken and working bits;
     
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Aug 31, 2011, 12:36 PM
 
Maybe he meant run the application in 32-bit mode? You do that with a checkbox on the Get Info dialog of that application in Finder.

What mode the kernel runs in should not matter at all, unless kernel extensions are involved.
     
Andrej  (op)
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Aug 31, 2011, 05:55 PM
 
This research application is a universal binary. There is no "run in 32-bit" checkbox with this application... I've seen it in others but not in this one.
This one time, at Boot Camp, I stuck a flute up my PC.
     
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Sep 1, 2011, 12:33 AM
 
It's a 32-bit application, then.

Well, you know how to boot into 32-bit kernel, now.
     
   
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