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Reinstalling OS X on a G5 with an nVidia 6800 Ultra
Authored by: mike666 on Jan 20, '05 01:42:51PM

Please keep in mind that this won't necessarily work for everyone and may not even work properly in the long run for the author of this thread.

When you follow this procedure you're installing OS X for a different set of hardware and more importantly, a different processor class. While it may appear to work, the bootX file installed (among other things) is going to be different than the one that would've normally been installed when booted on the target machine itself and so some low-level stuff may not load properly at startup.

If you upgrade your video card, the best thing you can do is to keep the old one and if you need to reinstall OS X from scratch, reinstall the old card, install OS X, do your upgrades or install the drivers your 3rd-party card needs, and then reinstall the new card.

If you've upgraded your old card because it died, then it would pay to invest in updated OS X install discs or even buy a cheapie AGP card that'll work with your old ones.

That's my 2ยข - don't spend it all in one place...



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Reinstalling OS X on a G5 with an nVidia 6800 Ultra
Authored by: Nimitz on Jan 20, '05 02:23:45PM

Hmmm. Though this might hold true for MacOS 9 and older, MacOS X 10.3 for sure works on ALL platforms (as summed up on the box). I simply cannot imagine needing a special G5-version of MacOS X 10.3.

Of course, you MUST update your copy of MacOS X 10.3 using System Update, but that seems obvious.
When I had problems as mentioned above, I wasn't thinking of wrong mach kernels or something.

(Kind regards to the folks of Apple Belgium, by the way!)

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The Nimitz



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Reinstalling OS X on a G5 with an nVidia 6800 Ultra
Authored by: johnsawyercjs on Jan 22, '05 09:04:45PM

If the volume at least still boots, you can supposedly recreate the BootX file, using the command

sudo bless -folder "/Volumes/YourVolumeName/System/Library/CoreServices" -bootinfo "/Volumes/YourVolumeName/usr/standalone/ppc/bootx.bootinfo"

(the quote marks let you enter a volume name that contains spaces)

This uses the file "bootx.bootinfo" as the reference file from which to rewrite the BootX file for the particular version of Mac OS you're running. However, if you've copied an OS X installation from one Mac to another, this won't do anything to reassure you that your new BootX file contains the proper code for the Mac model that you do this on, since it will use the copied System's bootx.bootinfo file as its reference. But as "professor" points out below, the BootX file in OS 10.3.x is the same for all 10.3.x revisions.



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