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10.4: How to boot an Intel Mac from an external drive System 10.4
If you've got an Intel Mac, the process for getting it to boot from an external FireWire drive is different than it is for a PowerPC Mac -- an Intel boot drive requires a different partition scheme than does a PowerPC boot drive.

Jonathan Rentzsch has written a very detailed article on these differences for TidBITS, explaining just what is required to make it work, and some pitfalls to be aware of going forward.
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10.4: How to boot an Intel Mac from an external drive
Authored by: Jayce on Feb 07, '06 08:23:56AM

This tidbits article is interesting, but wrong !
The first tests I have made when I received my iMac Intel were all possible tests to boot the same OS for intel and PPC...
If I still can't use the same partition to boot PPC and Intel iMacs (because of the build difference between the 2 versions of Mac OS X), one thing that worked very well is to boot from 2 different partitions of the same disk !
A disk partitionned from an intel based mac CAN be used to boot from a PPC mac.

The possibility to boot the same OS for both platform will sure come in the future, we can already netboot a minimalist OS image...


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Jayce Piel - MosX.net redactor



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10.4: How to boot an Intel Mac from an external drive
Authored by: matx on Feb 07, '06 12:33:25PM

As for imaging and booting these new Intel beasts, you are required to make separate netboot/netinstall images, according to the Apple peeps on the osx-server/imaging/enterprise lists.


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Mat X -- VFX Mac Tech



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10.4: How to boot an Intel Mac from an external drive
Authored by: pmccann on Feb 07, '06 01:44:05PM

OK, that's certainly true for now, as the Intel machines have different OS build numbers than regular old 10.4.4. But does anyone know whether this is going to be the case down the track? That is, when 10.4.5 comes out, will the same image (physically held on different partitions, different drives, whatever it takes...) boot both machines?

Thanks for any insight,
Paul



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10.4: How to boot an Intel Mac from an external drive
Authored by: hixer on Feb 07, '06 09:41:47PM

I really didn't have any trouble booting into 10.4 from a new external firewire hard drive. I used CCC 2.3 and then repaired permissions. It started right up. I was a bit surprised given the concerned buzz.

Jim
20" Intel iMac



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10.4: How to boot an Intel Mac from an external drive
Authored by: oldluddite on Feb 07, '06 10:10:48PM

I formatted/partitioned (via GUID scheme on Intel iMac) an external hard drive; cloned system over from the iMac via Carbon Copy Cloner, did the usual Repair Permissions and so on. Booted up fine in Intel iMac. Did not boot up on G5; showed up in Startup Disc and on the desktop, but no boot. Cloned a system from the G5 onto another partition of this hard drive; cloned OK, but not bootable from either the G5 or iMac. Appears to me that we will need a separate firewire drive for each computer... at least so far. I would dearly like to boot both computers from one external hard drive, so if someone has been able to do it, please share the steps needed. thanks.



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