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tbluhp
Feb 18, 2012, 01:57 PM
I am trying pressing number 2 and 3 during boot and I am unable to get into 32 bit mode?

macbook 2010 2ghz



pdjudd
Feb 18, 2012, 02:01 PM
i *believe* OSX ML is 64 bit only - I don’t think there is a 32 bit Kernel.

nostylluan
Feb 18, 2012, 02:20 PM
there is no 32bit, that is why a lot of legacy comps can't run mountain lion.

skaro
Feb 19, 2012, 11:07 AM
You can still boot into a 32-bit kernel, but you need to modify boot.plist as holding 3 and 2 no longer seems to work. Just add arch=i386 in to boot.plist and reboot.

I assume this will go in future builds but it works for now. One thing to note, it seems you can't access file shares in 32-bit mode for some reason.

Ke5
Aug 27, 2012, 03:06 PM
You can still boot into a 32-bit kernel, but you need to modify boot.plist as holding 3 and 2 no longer seems to work. Just add arch=i386 in to boot.plist and reboot.

I assume this will go in future builds but it works for now. One thing to note, it seems you can't access file shares in 32-bit mode for some reason.

Skaro - could you provide exact instructions on how to add arch=i386?

Thanks in advance. I realize this thread is old, but I can't find this information anywhere else.

skaro
Aug 28, 2012, 01:46 AM
Skaro - could you provide exact instructions on how to add arch=i386?

Thanks in advance. I realize this thread is old, but I can't find this information anywhere else.

Hi

You need to edit /Library/Preferences/SystemConfiguration/com.apple.Boot.plist. You need to amend the Kernel Flags entry to look like this:-

<key>Kernel Flags</key>
<string>arch=i386</string>

If it doesn't exist just add it and then reboot.

I have no idea whether this works in the release version of Mountain Lion but good luck :)