original Mac Pro & OSX 10.7

[jeanlain]

A 64bit EFI is not a requirement for a 64bit kernel, 32bit EFI can boot a 64bit kernel just fine. Your machine can run in pure64 right now, on several OSs. The restriction on 64bit OSX kernels booting on older machines is purely an arbitrary Apple restriction, and looks like it'll vanish with 10.7.

Care to develop? I thought that old Mac Pros still booted the 32-bit kernel in Lion.

 

[goMac]

Not from all of us with the first Core 2 Duos iMacs.

You mean the first Core Duo iMacs?

 

[stroked]

You mean the first Core Duo iMacs?

Unless I'm misinformed, my late 2006 imac cor 2 duo will not be able to use 10.7.

 

[jeanlain]

Unless I'm misinformed, my late 2006 imac cor 2 duo will not be able to use 10.7.

You're not well informed because this issue is indicated in the seed notes. Thus, it'll most likely get fixed.

 

[goMac]

You're not well informed because this issue is indicated in the seed notes. Thus, it'll most likely get fixed.

This.

It's a known bug, happens every initial OS X seed, usually some machine has a driver issue for the first few seeds.

 

[stroked]

This.

It's a known bug, happens every initial OS X seed, usually some machine has a driver issue for the first few seeds.

That's good, I'm never in a hurry to upgrade. I just installed SN a month ago.

 

[goMac]

That's good, I'm never in a hurry to upgrade. I just installed SN a month ago.

Never in a hurry to upgrade? Lion isn't even out yet, you'd be upgrading before it's even available to upgrade to.

 

[stroked]

Never in a hurry to upgrade? Lion isn't even out yet, you'd be upgrading before it's even available to upgrade to.

I know that.

 

[Cindori]

Course it still would.



I mean start stripping the 32 bit binaries out. For running 32 bit apps they'd have to leave the system 32 bit binaries intact, but application 32 bit binaries would be gone.

I meant the 64 bit kernel not apps.

A 64bit EFI is not a requirement for a 64bit kernel, 32bit EFI can boot a 64bit kernel just fine. Your machine can run in pure64 right now, on several OSs. The restriction on 64bit OSX kernels booting on older machines is purely an arbitrary Apple restriction, and looks like it'll vanish with 10.7.



This is not true, however the first iterations do.



Yes it will, as I said earlier in this post, the 1,1 and the 2,1 are fully 64bit OS capable machines, and since Apple's explicit restriction is 64bit CPU 10.7 will run fine at release.

any proof on this? that 1.1 mac pro's will boot 64-bit in Lion beta?

ofc it will run other OS in 64-bit, the bios emulation is 64-bit
but efi still 32

 

[seek3r]

I meant the 64 bit kernel not apps.



any proof on this? that 1.1 mac pro's will boot 64-bit in Lion beta?

ofc it will run other OS in 64-bit, the bios emulation is 64-bit
but efi still 32

BIOS emulation has nothing to do with it, the CPU is 64bit, it can run in 64bit mode and execute 64bit code, that's what you need to run a 64bit OS.

You can boot a 64bit Linux system on older, core2 intel macs, without using bios emulation (see elilo), the big thing the bios emulation adds is *not* 64bit kernel support but support for bios-based *graphics drivers*.

 

[jeanlain]

I still don't see any evidence that a Mac with 32-bit EFI will boot a 64-bit kernel of Lion.

 

[lewdvig]

Apparanetly certain PC video cards work in 10.7 without requiring a bios flash. Generica 5770 and 5870 cards.

That would make the upgrade worthwhile right there if it stays in the final release.