Clark Martin wrote on 2015-09-03 17:04:
>> On macintoshgarden I found various cdroms, mac os 10.1 mac os 9.2 for this 
>> machine and 5 cd set to restore mac.
> Are you sure the Restore disks are for this model of G4 (Mirror Drive 
> Door???)?

True, Restore Discs only work with the correct model.
http://www.everymac.com/systems/apple/powermac_g4/index-powermac-g4.html
Accoring to EveryMac.com all Mirrored Drive Doors were "PowerMac3,6".
The only difference is that the FW800 models were not able to boot
directly into Mac OS 9. This is some change in the firmware of the Mac
itself, most likely because Apple did not want to add additional
FireWire-800 drivers for Mac OS 9.2 anymore, so they simply disabled it.

Nevertheless, all Power Mac G4 MDDs were able to boot into Mac OS X:
10.2 on the original 2002 MDD model, and at least 10.2.3 on the 2003
model with FW800. The special 2003 model of the original MDD without
FW800 was again able to boot into Mac OS 9.2 natively and was also fully
supported by Mac OS X 10.2.

Note: Both models came with a 1.25 GHz Dual Processor option, so we
don't know exactly which model this is: MDD (order number M8573LL/A) or
FW800 (order number M8840LL/A), or even the 2003 model of the MDD (order
number M9145LL/A).

In simple words: every Mac OS X that is newer than the release of the
Mac will be able to install on it. Older version may or may not install,
and may or may not run if restored from backup. For example, I was able
to install Mac OS X 10.3.3 on a Mac mini 2005 that originally came with
Mac OS X 10.4.2 (PowerMac10,2) – even the original first Mac mini
(PowerMac10,1) originally came with Mac OS X 10.3.7, still I was able to
install 10.3.3 using the installation DVD. Just saying.

Mac OS is different. Because a special "Mac ROM" is required, in a lot
of cases you will need the version that came with the Mac and no other
will run.

>> However mac os x does not boot.
> There maybe a firmware issue.  I don't know of a specific issue with this 
> machine and OS X but some machines require a firmware update before they can 
> run X. 

No, because the Power Mac G4 MDD had that ability from the start.

>> mac os 9.2 does boot but does not find any hard disks
> What do you mean it doesn't find the HD?  Doesn't appear in Finder, in HDSC 
> Setup, in Drive Setup or something else.

Well, I assumed that no HDD is seen from Disk Utility or available as
installation target.


Cheers,
Andreas  aka  Mac User #330250

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