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Old Jun 16, 2010, 09:39 PM   #1
NakedLunch
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reinstalling OSX for my PPC on an Intel machine

Hello all, thank in advance for your time.

I've reformatted my G5 PPC hard disk in my roommates Mac Pro and I was wondering if it's possible to install Tiger on this disk FROM the Mac Pro but FOR the PPC G5.

I ask because the logic board went out on the PPC and I'm afraid it won't stay booted long enough for me to do a full install on my own machine.

Again, thanks.
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Old Jun 16, 2010, 09:44 PM   #2
mkrishnan
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I think the answer is no, in general, but particularly with Tiger. Tiger came in three kinds of discs...

- 1) PPC system restore discs and 2) PPC retail discs -- neither of these have Intel code on them and AFAIK they won't boot up on an Intel Mac to do the installation to begin with (Rosetta lets Intel Macs run PPC code, but it has to run on top of the Intel kernel, which isn't on the discs).

- 3) Intel system restore discs -- these will boot Intel Macs, but AFAIK they don't have the PPC kernel on them to install onto the PMG5, so they don't work either.

I don't think you can do it with Leopard, either... you don't have any working bootable clones or anything? Can you borrow someone's PPC Mac to make the boot disc?
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Old Jun 16, 2010, 10:46 PM   #3
NakedLunch
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Thanks. I'll check around to see if anyone in these parts has a PPC.
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Old Jun 16, 2010, 10:51 PM   #4
pdjudd
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Originally Posted by mkrishnan View Post
3) Intel system restore discs -- these will boot Intel Macs, but AFAIK they don't have the PPC kernel on them to install onto the PMG5, so they don't work either.
That won’t work for sure - restore discs are machine specific.
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Old Jun 17, 2010, 09:53 AM   #5
iThinkergoiMac
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If the logic board went out on your G5, how do you plan on running the system even if you do get it installed?
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Old Jun 17, 2010, 10:33 AM   #6
666sheep
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Originally Posted by pdjudd View Post
That won’t work for sure - restore discs are machine specific.
It's not biggest problem. It was proven, that with some fiddling (modified OSInstall.pkg) it will work. There is PPC kernel on Intel machine specific disks.

Main problem is, that Installer which will running on Intel Mac (Mac Pro in this case), will install Intel kernel only (because it "sees" Intel CPU) and default partition type will be GUID instead APM (required for PPC). Simply: OS installed that way will be non bootable on PPC.
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Old Jun 17, 2010, 12:21 PM   #7
NakedLunch
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Thanks all. Here's the update:

Formatted the drive on a friend's intel machine. Luckily, using the hair dryer to warm up the front of the logic board, I was able to keep the machine running long enough to clean install OSX. It was kind of like a miracle and pretty funny seeing the "Welcome to OS X" presentation after all these years.

It was an inconvenience, but success. Now if only I could find someone to reflow this thing locally that won't charge me an arm and a leg.
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