Habe bisher noch nirgendwo davon gelesen, ob es nun definitiv geht oder nicht.............

engl.Anleitung zum Patch eines neuen G4 =

ALERT: Booting Mac OS 9 on 2003 (Mac OS X only) Macs
After months of searching, it seems that we have finally found a solution for booting Mac OS 9 on Macs released after January 1, 2003 - which are designated as exclusively capable of booting Mac OS X by Apple.

Apple recently posted a new file to its private Apple Service Provider web page (accessible only by account-holding Apple technicians and resellers) titled "MacTest Pro for Power Mac G4 (March 2003) Version 7.8.1 supports all iMac (Flat Panel) 15 inch systems only."

The file is a CD image which can be downloaded and burned, then used as a startup disk. Testing in "Mac OS X-only" flat panel iMac system revealed that the image properly booted Mac OS 9.

Users can then copy a stripped-down Mac OS 9 system folder to their hard drive, and select it with the "Startup Disk" System Preferences pane, delivering a Mac OS 9 bootable internal disk.

It appears that a new MacOS ROM file (ver. 9.8.1) allows booting from the image.

Of course, this solution is only readily accessible by Mac service providers, but it shows that Mac OS 9 boots are not impossible on Apple's new machines. Also, please note that Mac OS 9 startup was not tested on any machines other than the 2003 flat-panel iMac.

You'll need a file named "MacTestPro_iMac/G4.dmg".

693-4817-A
Apple Hardware Test (Power Mac G4)
- AHT for Power Mac G4 Version 2.0.1, for use with Power Mac G4 (Gigabit Ethernet), Power Mac G4 (Digital Audio), Power Mac G4 (QuickSilver), and Power Mac G4 (QuickSilver 2002), added support for the NVIDIA GeForce2 Ti video card with (Gigabit Ethernet and Digital Audio) systems, Power Mac G4 (QuickSilver 2002ED), PowerMac G4 (Mirrored Drive Doors) and Power Mac G4 (FW 800).

That's just the system disk for running "classic" under OSX. That won't let you boot into OS9 on the FW800 machines.
What these folks are looking for is a file called:
MacTestPro_iMac/G4.dmg
which may let some FW800 machines boot into OS9


Joined: 02 Mar 2002
Posts: 187
Location: Thule
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Posted: Mon Apr 14, 2003 7:12 pm     Post subject: Install OS 9 on 2003 Macs!

i found this at a server. this might shed some more light on the problem (or it might confuse more)...

This hint is for owners of the newest machines, which ship with Jaguar preinstalled. If you're like me, the first thing you want to do (after checking that the factory configuration works OK) is repartition the hard drive and install OS 9 and X on separate partitions. Only problem? The new machines don't include a proper OS 9 install disc, and the Software Restore discs only want to restore your machine to the factory configuration (OS 9 and Jaguar on the same partition). So unlike owners of older machines, you can't just pop in the OS 9 install disc and do a clean install. Here's how to get it done...

1. Restart with the Jaguar install CD in the drive and hold down the C key to boot off of it.

2. When the installer comes up, select Disk Utility from the menu and repartition your hard drive the way you want it. I named my partitions "Mac OS 9" and "Mac OS X" to avoid confusion, but do what you want. Make sure you check the box to install OS 9 drivers or you won't be able to boot it natively on the partition you've selected.

3. Once the partition is done, quit Disk Utility and continue with the installation. I highly recommend doing a custom installation and deselecting the multilanguage and localization support.

4. Reboot to your newly installed Jaguar and insert the first Software Restore CD (it may be named differently depending on what machine you got).

5. Open up Terminal (in /Applications/Utilities) and on the command line type:
% cd "/Volumes/Software Restore/.images"
Replace "Software Restore" with the name of your CD as it appears on the desktop (mine had "iBook" at the beginning).

6. Type ls at the command line and you should see some disk image (.dmg) files, including OS9General.dmg (again yours may be named differently than mine - I don't know).

7. Mount the disk image from the command line with open ./OS9General.dmg .

8. Open up the mounted disk image in the Finder. Also open up your empty OS 9 partition. Select all folders in the disk image and copy them to the OS 9 partition.
Once this was done, I could go into the Classic preference pane and it would recognize the system on the OS 9 partition. The Startup Disk pane also recognized the OS 9 system, and I could successfully boot OS 9 this way. But holding down the Option key at bootup only recognized OS X in the firmware, so there was more work to be done: I needed to re-bless the OS 9 System Folder from OS X. According to an article in Apple's knowledge base, here's how to do that:

1. Open System Preferences and click on Startup Disk.
2. Choose the OS 9 System Folder.
3. Click on Show All in the upper left corner of the window. When it asks if you want to change, select Change.
4. Click on Startup Disk and repeat the procedure a second time.
At this point, I could boot my new iBook into either OS 9 or OS X from the firmware by holding down the Option key.

Follow a similar procedure to restore any other software that came with your machine (AppleWorks, World Book Encyclopedia and a few games came with mine). Just pop in each of the Restore CDs, go to the .images directory of that CD from the Terminal command line, copy the dmg file to the hard disk, mount it, and copy the files you need. Doing it this way, you can selectively restore any software without using the all-or-nothing restore program (which kind of defeats the whole purpose of doing this)

Eigentlich dürfte es nicht gehen, da angeblich keine OS9 Firmware mehr in den neuen Prozessoren ist. Wenn man die allerdings irgendwie wieder da hineinbekommt... Wer weiß?

Das Problem sind nicht die Prozies, siehe CPU-Updates für die alten G4s.
Das Problem ist eine Emulation des MacOS-Roms, welches für MacOS9 benötigt wird. Wenn es eine Möglichkeit gibt ein Image dieses Roms von der HD zu laden, sollte das booten möglich sein.