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How to force 64-bit kernel on Snow Leopard build 10A380 (WWDC'09) ?

pskpsk said:
The latest 10A380 seed notes do not have these information in it. But the 10A354 DOES include a list of 64-kernel default/capable machines. MacPro1,1 is not one of them, ;-(.
Click to expand...
You keep saying MacPro 1,1 but you have a Macbook Pro 1,1 (or am I confused here)?
 
pskpsk said:
Yes, I do have a MacbookPro 1,1. I am saying that both MacbookPro1,1 and MacPro1,1 are not in the list.
Click to expand...
That appears to be true as of now, but MacbookPro 1,1 will never be in the list because it is not 64-bit capable. MacPro 1,1 (and others) may be added before release.
 
got it to work on my uMBP using the 6+4 startup method. but like it was said before i think the comp needs to be pretty recent.
 

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kbmb said:
What the heck does the computer name have to do with this?

Last time I looked the original poster is running a MacPro1,1?

Is this a secret requirement of Snow Leopard? To name your machine correctly?

-Kevin
Click to expand...

LOL. Wait.. mine's named PlayStationX10.6

Is that a crime too?:p
 
Now that I have updated to build 10A394, I am finally able to force the my machine to boot the pure x64 kernel by default (with the x32 kernel being the optional one) without needing to hold down 6 & 4 until login.

Adding the string "Kernel Flags" and giving it the value "arch=x86_64" to /Library/Preferences/SystemConfiguration/com.apple.Boot.plist did the trick. For reference, I am using a penryn MBP (the last model before Apple switched everything over to NVIDIA chipsets).
 
Riemann Zeta said:
Now that I have updated to build 10A394, I am finally able to force the my machine to boot the pure x64 kernel by default (with the x32 kernel being the optional one) without needing to hold down 6 & 4 until login.

Adding the string "Kernel Flags" and giving it the value "arch=x86_64" to /Library/Preferences/SystemConfiguration/com.apple.Boot.plist did the trick. For reference, I am using a penryn MBP (the last model before Apple switched everything over to NVIDIA chipsets).
Click to expand...

That works for me.

Anybody wondering, this is what it looks like in Boot.plist,
Code: 
<dict>
    <key>Kernel</key>
    <string>mach_kernel</string>
    <key>Kernel Flags</key>
    <string>arch=x86_64</string>
</dict>

One of the first thing I notice is that my logitech mouse doesn't register anymore with the LLC and Little Snitch doesn't work either.

System is Early 2008 MBP 17" 2.5Ghz Penryn.

Update: Had to boot back to 32bit for now. Will switch back to 64bit whenever little snitch is SL ready.
 
Riemann Zeta said:
Now that I have updated to build 10A394, I am finally able to force the my machine to boot the pure x64 kernel by default (with the x32 kernel being the optional one) without needing to hold down 6 & 4 until login.

Adding the string "Kernel Flags" and giving it the value "arch=x86_64" to /Library/Preferences/SystemConfiguration/com.apple.Boot.plist did the trick. For reference, I am using a penryn MBP (the last model before Apple switched everything over to NVIDIA chipsets).
Click to expand...

I can confirm that this method works for the mid-09 macbook pro.

although, little snitch does not load, so i will pass for now.
 
I was able to moved the boot.plist to the desktop, edited there and copied it back to SystemConfiguration. I still cannot get it to boot into 64bit. Here's my com.apple.Boot.plist:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>Kernel</key>
<string>mach_kernel</string>
<key>Kernel Flags</key>
<string>arch=x86_64</string>
</dict>
</plist>
 
vpkb1998

i thing not all models allowed for 64 kernel now :( i have same problem in my MacBook Air
 
kropotov said:
vpkb1998

i thing not all models allowed for 64 kernel now :( i have same problem in my MacBook Air
Click to expand...

That's a bummer, Apple needs to be more forward with this. Hopefully, something will be done in with the final release.

After the most recent SL update, my friend's new MBP booted with the 64bit Kernel automatically.
 
kropotov said:
of course, in final release SL will support all models, which support 64bit on hardware level
Click to expand...

How do you know this? I guess either way, I'll be happy. If no 64, it's just more of a service pack to me, and I'm glad they're only charging $29.00.
 
vpkb1998 said:
How do you know this? I guess either way, I'll be happy. If no 64, it's just more of a service pack to me, and I'm glad they're only charging $29.00.
Click to expand...

Because so far, Apple didn't say otherwise.

In fact, the last two seeds bought 64bit kernel support for more intel mac models. With 2 months left, it should be enough to push the support throughout all Intel Macs except the Core Duo models.

It is not that 64bit kernel isn't working for all Intel macs, it is the few remaining extensions that needs to be recomplied into x86-64 in order for the kernel to run. True 64bit kernel requires all extensions to be 64 bit with no absolute exceptions even if a single MBP has all 39/40 extensions in 64bit, it still will not boot until that last extension gets recompiled. That's the situation right now and why it doesn't work on some models.

The kernel support for my early 2008 MBP 17" only appeared in 10a394 build and other people early 09 macs started working in 64bit mode with 10a402a build.
 
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