At 8:52 PM -0500 12/8/2008, Al Poulin wrote:
>Apple tech article:
>http://support.apple.com/kb/TS1550?viewlocale=en_US
>
>tells me that to use Time Machine to an external hard drive from a 
>PowerPC-based Mac, the drive must be initialized with Apple Partition 
>Map partition scheme.  From an Intel Mac, it must be initialized with 
>GUID partition scheme.  So I would need two separate external drives
>to handle a G4 and three Intel Macs.

There is a bad information inconsistency here, as you've discovered.

What we thought we knew was:
1.  PowerPC-based Macs can only boot from APM disks.
2.  x86-based Macs can only boot from GUID disks.

Thus the problem of making multiple mixed-platform *bootable* clones 
on a drive, as you've discovered.

But then it would seem newer versions of Leopard (or perhaps just the 
firmware?) have changed that!  x86 Macs can now boot on APM drives!

Does that means *all* x86 Macs can do this?  I donno.  I'm finding no 
consistent / definitive information on the 'net.  And so far, every 
x86-based iMac and Mac Pro I've tried, running updated Leopard, is 
able to boot from an APM disk containing a clone of updated Leopard. 
I have NO information regarding other Macs or Tiger or un-updated 
Leopard...

I'm thinking you'd need to run a test with your x86 Macs - see if 
they'll boot from an APM drive.  If they do, then you're all set.  If 
they don't, then you'd need two drives.

And hopefully, other LEM folx can try things out...

HTH,
- Dan.
-- 
- Psychoceramic Emeritus; South Jersey, USA, Earth

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