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10.7 Mac Pro 09 and up only

Has anyone tested the developer preview on a Mac Pro 1,1?

I would like to think (but doubt) that Apple would be nice enough to release a firmware update to allow the machine to boot into 64bit mode.

Arbitrary restrictions:rolleyes::apple:
 
people have already the beta Lion 10.7 running on Mac Pro's 2006, dont worry.


the support fore Core duo intel cpu (32 bit cpu) is dropped though, so first Intel Macbook Pro and some other Macs will not run it. Mac Pro 2006 and up will though, cause it has 64-bit cpu.

it shows though that Apple were willing to drop support for first gen Intel machines and it wouldnt have been a impossible thing to drop 32bit efi and 2nd generation also... we will 95% see it happen in 10.8
 
hugodrax said:
Lion for 64bit computers only. Since anything with EFI32 will not boot a 64bit kernel. That means 09 and up only.

from what I hear recently.
Click to expand...

You bumped your thread with bad info to spout more bad info. Your sentence makes no sense either, as others have pointed out.
 
this takes the cake as the most insane rumor i've come across on the internet in some time, probably years (though i don't make it out to 4chan often, so that may not be saying much). You're talking about cutting support for systems that may still be under applecare warranties, for god's sake.
ludicrous! :)
Like Cindori said, it'll happen at some point, but 10.7 is far too soon.
 
Apple has no reason to drop K32.

I had, however, been hearing that they had been looking at dropping 32 bit ever since the times of the 2006 Mac Pros. Decreases binary sizes, allows them to push the new 64 bit ABI with some nice developer features.

Have never heard anything about dropping K32 though. No engineering reason why they'd need to. I'd say we're likely to see an entirely new kernel before they'd drop K32.
 
Any thoughts about the reasons preventing the 64-bit kernel from running on EFI32 Macs, while these Macs run Windows and Linux 64-bits without issue?
 
jeanlain said:
Any thoughts about the reasons preventing the 64-bit kernel from running on EFI32 Macs, while these Macs run Windows and Linux 64-bits without issue?
Click to expand...

My guess is it's because Mac OS X is more closely tied to the EFI pre-boot environment, whereas BIOS is a bit "dumber" than EFI.

Aside from worrying about OS updates, there isn't much advantage to K64 on a 06 Mac Pro anyway, which is why it's not a priority for Apple to update the firmware.

Edit: K32 actually runs in 36 bit mode, which pretty much gets rid of any issues that would have come with a real 32 bit kernel. And the userland runs in pure 64 bit on an 06 Mac Pro, which is really where it matters.
 
Another thing to remember is that K32/K64 are not really Apple controlled projects. The lead developer actually works at Microsoft. Yes, Apple could just stop including K32, but it would take a broader decision than that actually stop K32 development.

It's not like Steve is just going to one day say "Stop K32 development!" Apple doesn't even have that power, although they could take their engineers away from the project.

A more likely situation for Apple dropping K32 is if they wrote their own kernel.
 
Aside from what cindori has already posted, rest assured that if my 2008 Mac Pro is prevented somehow from running 10.7, Mr. Jobs will find my Mac Pro tower lodged in the windshield of his car. :D
 
goMac said:
Another thing to remember is that K32/K64 are not really Apple controlled projects. The lead developer actually works at Microsoft. Yes, Apple could just stop including K32, but it would take a broader decision than that actually stop K32 development.

It's not like Steve is just going to one day say "Stop K32 development!" Apple doesn't even have that power, although they could take their engineers away from the project.

A more likely situation for Apple dropping K32 is if they wrote their own kernel.
Click to expand...

Since you seem to know... tell us a little more about who actually does control the OS X kernal. Inquiring minds want to know!
 
Lion works fine on Mac Pro 1.1 (32bit Kernel though)

macpro.png


gullySn0wCat said:
Has anyone tested the developer preview on a Mac Pro 1,1?

I would like to think (but doubt) that Apple would be nice enough to release a firmware update to allow the machine to boot into 64bit mode.

Arbitrary restrictions:rolleyes::apple:
Click to expand...
 
Last edited:
goMac said:
http://www-2.cs.cmu.edu/afs/cs/project/mach/public/www/mach.html

There's the homepage.

Keep in mind Apple's version is modified, but Mac OS X is based on an open source kernel.

I believe Apple's modifications are also open source.
Click to expand...

Web page last update in 1997???... I wouldn't exatly say they are actively developing. Leads me to believe that apple has to have their own kernel development team somewhwere. I believe you're right that the mods should be open source.
 
hyram said:
Web page last update in 1997???... I wouldn't exatly say they are actively developing. Leads me to believe that apple has to have their own kernel development team somewhwere. I believe you're right that the mods should be open source.
Click to expand...

Mach is still under development, several other OS's use it...

But the feeling I have is that there hasn't been very much active development at Apple either on Mach. One of the lead developers on Mach was actually employed by Apple for a long time, and he left Apple several years ago.
 
Cindori said:
people have already the beta Lion 10.7 running on Mac Pro's 2006, dont worry.


the support fore Core duo intel cpu (32 bit cpu) is dropped though, so first Intel Macbook Pro and some other Macs will not run it. Mac Pro 2006 and up will though, cause it has 64-bit cpu.

it shows though that Apple were willing to drop support for first gen Intel machines and it wouldnt have been a impossible thing to drop 32bit efi and 2nd generation also... we will 95% see it happen in 10.8
Click to expand...

I'll replace my 1,1 for 10.8. :)

Maybe. I am very pleased with my 1,1 and can't see myself wanting a new one.

Shame about the EFI issue. I would love to get a new nvidia video card.
 
Unless you have more than either 32 or 64gb of RAM (can't remember which) the 32 bit kernel doesn't make a difference:D
 
Just heard on insanelymac that you can install Lion on unsupported (Macbook first gen) computers if you simply remove a Plist called PlatformSupport.



This basically means:
Apple made a Plist to block out old devices on purpose.
:(
 
You can install the current developer version of Lion on any Intel Mac just by removing the PlatformSupport.plist ;)

Even Core Duo is supported that way.
 
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