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10.4: Install Tiger on a Lombard PowerBook G3
Authored by: jrsharp on May 10, '05 05:28:44PM

I came up with a way to install Tiger on the Lombard directly by creating a modified DVD. (only applicable to DVD-ROM models, of course) You can read about it here:

http://jonsharp.net/archives/2005/05/06/installing-tiger-on-lombard/



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10.4: Install Tiger on a Lombard PowerBook G3
Authored by: johnsawyercjs on Jun 11, '05 02:10:10AM

jrsharp's article is no longer to be found at that link. Here it is--though the process he describes is more elaborate than the methods described above, it's technically interesting, or actually useful if you can't follow the approaches above for some reason:


Installing Tiger on Lombard

Ok guys, I know what I said earlier about not getting Tiger to install, but I got to thinking about it and I had an idea. After digging around on the Tiger Install DVD, I found my answer. Here's what I did to get the installer to install on my Lombard:

First, I created a CD/DVD master image from the Tiger Install DVD using Disk Utility. Then, I mounted the image. Then I found the OSInstall.dist file in:

/System/Installation/Packages/OSInstall.mpkg/Contents

on the image. [jonsaw: open it with TextEdit] Near the top of the file is a line that specifies a list of "badMachines", or some such. In that list is "PowerBook1,1", the model code for the PowerBook G3 Lombard. I simply modified that entry to read "PowerBook3,1". I then unmounted the image and burned it to DVD-R. My Lombard booted right up the installation DVD as it had before, but this time I received no error messages regarding unsupported hardware.

So, there you have it! It turned out to be much simpler than I had expected. Now, I must admit that I have not performed the installation of Tiger yet, so I cannot yet verify that the installation will complete successfully, but I plan to install a new HD in the machine and test it out at least before going back to Gentoo. I really don't think Tiger will perform very well on this old machine, but it's fun to try it out. :)

Now, a note for Lombard users without a DVD drive: I would expect that you could perform the same operation on the CD version available as a special order from Apple.


jonsaw comment:
This is a brilliantly simple hack. However, changing the "badmachine" listing to "PowerBook3,1" prevents the DVD from installing onto a Powerbook G3 Firewire (Pismo). I think it's better to delete the reference to Powerbook1,1 altogether. "Powerbook2,1" is the first clamshell iBook, which I suspect will run Tiger just fine too, so you might as well delete that too.

The actual line from the OSInstall.dist file:

var badMachines = ['iMac','PowerBook1,1','PowerBook2,1', 'AAPL,Gossamer', 'AAPL,PowerMac G3', 'AAPL,PowerBook1998', 'AAPL,PowerBook1999'];

I would remove the first three references ('iMac','PowerBook1,1','PowerBook2,1'), to change this to:

var badMachines = ['AAPL,Gossamer', 'AAPL,PowerMac G3', 'AAPL,PowerBook1998', 'AAPL,PowerBook1999'];

…since removing 'iMac' allows installation onto the tray-loading iMacs; removing 'Powerbook1,1' allows installation onto the clamshell iBook; and removing 'PowerBook2,1' allows installation onto the Powerbook G3 Lombard-- Tiger will run on all of these. However, the remaining installation problem with these models, using the original Tiger installer DVD, is finding one that contains a DVD drive, so you're better off exchanging the Tiger installer DVD for CDs (through Apple), and modifying the installer CD. You can't install 10.4 onto these models via Target Disk mode, since these models don't support Target Disk Mode, since they don't have Firewire ports. The Gossamer is the beige G3, which I know Tiger won't run on, nor install on, until XPostFacto is updated to do it; I don't know which model the 'PowerMac G3' is, unless it's a variation on the beige G3; and the 'PowerBook1998' and 'Powerbook1999' are the Wallstreet Powerbooks, about which I'm not sure yet. I also noticed that the list of badmachines above, doesn't include the 350 mhz slot-loading iMacs, even though they don't have built-in Firewire, so I suspect the 10.4 installer will run on these Macs without modification.



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