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Level 1

0 points

MacBookPro3,1 + Snow Leopard = 32 bits.

The MacBookPro 3,1 should be capable of running the 64 bit kernel but it's not on the list.

Core2duo = 64 bit
Santa Rosa chipset = 64 bit (I have 4GB and it can use it all)

Yet with the 6+4 key press, the Boot.plist and nvram modifications this will not boot into 64 bit kernel.

My reason for wanting this is that I'm concerned with a 32 bit kernel mode then OpenCL drivers will only allow addressing of 2GB.

I know in the past that nVidia CUDA & ATI CTM GPGPU drivers only supported 32 bit on PC platforms until they decided to move forward.

So what reason is there? Is the MBP3,1 considered obsolete Apple?

MBP3,1 15" 2.4 SR, 4GB, 120GB SSD, Mac OS X (10.6)

Posted on Aug 29, 2009 4:37 AM

192 replies

Sep 7, 2009 1:53 AM in response to Roca Chang

If you're right about the firmware, then I hope they release an update for the MacBook Pro 3,1 as I own one (it's obvious from the specs in my signature).

I'm due to get my copy of Snow Leopard and I hope Apple is reading this matter & doing something about it.

Sep 7, 2009 7:04 AM in response to suckerpunch86

I hope this too...
My machine is full 64 bit capable.. I want a full 64 bit system.

My only comfort is that even the last macs can't boot into 64bit mode.

Sep 7, 2009 7:13 AM in response to Nick 1066

All your machine lacks is the ability to start in the 64-bit kernel. It still will run the same 64-bit programs using the 64-bit kernel that any other 64-bit capable machine will run.

Sep 8, 2009 6:08 AM in response to Nick 1066

I tried install Snow Leopard yesterday, but it didn't work as 64.
And what hapened with Safari, when I updated to Snow Leopard? Look at this screen - very big indents in Google! ((( http://ipicture.ru/Gallery/Viewfull/23396181.html
Has anybody had the same problem?

Krakatos

Level 1

39 points

Sep 8, 2009 8:19 PM in response to Roca Chang

Did Apple actually promise that they will release a firmware update for 3,1 Pros to run in 64-bit kernel mode? Or are we just dreaming that they will?

hochit

Level 1

0 points

Sep 8, 2009 8:30 PM in response to Krakatos

I think it's not a dream as Apple claimed our machines should be able to support 64 bit kernel.

See if it's fixed in the coming 10.6.1

Sep 9, 2009 10:20 PM in response to Nick 1066

I just installed Snow Leopard on my MacBook Pro and I've had a smooth upgrade. Although I'm not able to boot in 64bit, I have another question. Am I also supposed to have the 3 & 4 finger multi-touch gestures?

Sep 10, 2009 12:03 AM in response to suckerpunch86

nop, It' only allow MBP 2008 lately

Sep 10, 2009 12:04 AM in response to Krakatos

they don't , it's we hope that they will.

kadoudal

Level 1

8 points

Sep 10, 2009 12:37 AM in response to deivy

could not find ANY explanation from Apple why they don't authorize some 64-bits MacBook to boot w 64 kernel.... it's one of the biggest mess ever seen !

some dev guys are recompiling w X86-64 architecture other not... some posts -> Yes you have too, other posts -> No you shouldn't ....
(got this issue w MySQL upgrade , 64 or not 64... yes you should go to X86-64 as you have a Core 2 Duo, then no, you should not as your EFI is 32...)

finally the best move is NOT to move ! dev as usual...

R C-R

Level 6

17,782 points

Sep 10, 2009 2:27 AM in response to Nick 1066

Nick 1066 wrote:
The MacBookPro 3,1 should be capable of running the 64 bit kernel but it's not on the list.

What list?

Sep 10, 2009 5:04 AM in response to JamesAllen

JamesAllen wrote:
Doesn't work for me either. Can't see any reason either, from what I can tell its certainly capable hardware-wise of running the 64bit kernel.

I wonder if there's any other way to force it?

yeah.. there would be with a sudo lipo -remove -i386 mach_kernel (output-file)
but i tried and it wouldn't boot anymore.. (oh god my cat farted) so yeah... my best friend in times like this: time machine...

Sep 10, 2009 5:08 AM in response to kaosdroid

ah yeah and my guess is.. that most of the kexts for this model (3.1) aren't in 64bit and therefor it won't work.. didn't check that though...

R C-R

Level 6

17,782 points

Sep 10, 2009 5:25 AM in response to JamesAllen

JamesAllen wrote:
Doesn't work for me either. Can't see any reason either, from what I can tell its certainly capable hardware-wise of running the 64bit kernel.

First of all, you would need a 64-bit compatible driver for your graphics system & any other essential hardware to run the 64 bit kernel, right?

Secondly, I cannot find any current Apple k-base articles regarding support for starting up in 64 bit mode for Macs running Snow Leopard, just for Macs running Snow Leopard Server.

IOW, this may have nothing to do with hardware capability but instead with OS support that is not provided in the non-server version of the OS.

Krakatos

Level 1

39 points

Sep 10, 2009 7:45 PM in response to kaosdroid

I can't see any 32-bit only extensions in System Profiler, so I wouldn't think that's the reason it won't boot in 64-bit mode.

MacBookPro3,1 + Snow Leopard = 32 bits.