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MacPro vs mac mini
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hwojtek
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PostPosted: Sat Apr 30, 2011 9:24 am    Post subject: Reply with quote

This model (Mac Pro 1,1) doesn't run 64 bit kernel at all.
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billb
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PostPosted: Sat Apr 30, 2011 9:29 am    Post subject: Mac Pro 64-bit Hack? Reply with quote

I thought that would be the case.
I wonder if it could be hacked like
the older mini can be hacked.
I'll have to whip out Google
when I get a chance.
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hwojtek
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PostPosted: Mon May 02, 2011 5:28 am    Post subject: Reply with quote

What you mean by "hacking"? If you refer to modifying a couple of .plist files to force booting the 64-bit kernel, it's not "hacking", it's "setting the variables"...
Only few Macs currently shipping have the 64-bit kernel enabled from factory (the variables are set to 64-bit). Most of them are set to boot 32-bit kernel only. You can switch (set the variables in .plist files) to 64-bit kernel by yourself and boot the 64-bit kernel if the computer has a 64-bit EFI.
The Mac Pro 1,1 - exactly the model we are discussing here - doesn't have a 64-bit EFI. It will never boot the 64-bit kernel, since there is no 64-bit firmware in it. It has all the rest, the processors, the chipset - only the EFI firmware lacks in this picture and I highly doubt Apple will ever release a 64-bit EFI update for this machine.
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billb
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PostPosted: Mon May 02, 2011 7:56 am    Post subject: Reply with quote

Great answer. Thank you!
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hwojtek
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PostPosted: Mon May 02, 2011 12:51 pm    Post subject: Reply with quote

You're more than welcome. I keep upgrading my 1,1, but if Lion is 64-bit only, this excellent hardware will come to an end.
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aprilfools1993
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PostPosted: Thu May 05, 2011 4:09 pm    Post subject: Reply with quote



This is from my MacPro1,1. It shows about half of the processes running in 64-bit, but maybe I'm not talking about the same thing ya'll are talking about.
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billb
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PostPosted: Wed May 11, 2011 11:44 pm    Post subject: Not Running in 64-bit Reply with quote

I think what that shows is what App.'s are 64-bit
and not what Kernel they are running in.
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Last edited by billb on Thu May 12, 2011 12:23 pm; edited 1 time in total
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hwojtek
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PostPosted: Thu May 12, 2011 12:14 pm    Post subject: Reply with quote

Exactly. The apps themselves can be 64-bit no problem. However the kernel loaded is still 32-bit (and most of the Macs in the wild run this way without anybody even noticing it).
If you want to check your Mac for ability to run the 64-bit kernel, open up Terminal and type:
Code:
ioreg -l -p IODeviceTree | grep firmware-abi

(just copy/paste the above and press Enter).
If it replies:
Code:
    | |   "firmware-abi" = <"EFI64">

it will. If, however it says EFI32 - sorry, no luck. This computer will not boot a 64-bit kernel.
My unibody Mini and MBP both run 64-bit kernels just fine. My Mac Pro and Core 2 Duo Mini are 32-bit, but this makes no real difference.
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