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Making a Boot CD from a dmg

Submitted by mudogramx on February 20, 2006 - 10:29pm. PowerPC Macs

A few years ago, I made a dmg backup of my PowerMac G4's OS 9 Install Disc. I tend to make backups of system discs just in case I lose them (I move a lot). Luckily I did, because I did lose the disc Laughing out loud. I acquired an iBook clamshell recently. I burned the dmg to a disc. The iBook will not boot from it. I get a floppy disc icon with a question mark on it. After a couple minutes, the iBook shuts off. To make sure it wasn't just the iBook, I tried booting the disc on my PowerBook Pismo. Nada, same result. Is there something I'm missing to make this disc bootable? I don't ever remember booting from the original disc (I used OS X on the PowerMac). I just wanted to run OS 9 on the iBook since OS X is not a great performer on them.

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dankephoto's picture

all depends on how the .DMG was made

Submitted by dankephoto on February 20, 2006 - 11:27pm.

And it's real easy to make 'em wrong.

The disk image needed to be saved as a 'DVD/CD Master' else it won't boot jack$. I reckon you just saved an image of the mounted volume as a compressed image. That will never be bootable without completely reauthoring the disk image, for which I've used Toast 4.x under a classic MacOS. I'm unaware of any tools to do it under OS X.

dan k

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coius's picture

well...

Submitted by coius on February 20, 2006 - 11:42pm.

boot discs that came with one mac, will only work on that mac. Similair to windows OS, you can't use an emachines disc on a self built machine (well you can, but it won't work right, and then there is the liscencing thing) apple disabled it from doing that. So, you might just have to go out and buy a full OS 9 disc off of ebay

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mudogramx's picture

OK

Submitted by mudogramx on February 21, 2006 - 12:21am.

I found a copy for sale on macsales.com. I figured that would be the most likely solution. Thanks.

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MacIndows's picture

"Restore” discs will boot o

Submitted by MacIndows on February 21, 2006 - 12:36am.

"Restore” discs will boot on any Mac (the non-booting problem isn't related to the fact that the discs might be specific to a different Mac), but they may refuse to install.

However, on the iBook G3 "restore" disc that I've seen, the installer refuses to run on any other Mac but there's a hard drive image on the CD that can be copied to any Mac and it will work (unlike similar images that might be on an OEM Windows CD, as PCs vary much more than Macs) - I recently used he iBook's one for my Power Mac 6100 and it is fine after clearing out the extensions that don't apply to the 6100 (DVD, Airport, ATI graphics etc).

I saw something once saying that the only way to make a bootable OS X disc is to burn it from in X's Disc Utility program, not from Toast or anything else, although I don't have an OS X Mac so don't know if this is the case. Classic OS CDs seem easier to burn correctly as I have managed this perfectly well when burning images of them from a Windows machine (using Nero or something similar) - I've never had any luck with making bootable OS X discs from a PC, and all my Macs are way too old to have a CD burner or OS X (I was using the OS X discs for PearPC), so perhaps the image itself is not made correctly.

Anyway, there seem to be plenty of copies of OS 9 floating around so you shouldn't have too much difficulty in coming across one - you could try MacDomain.

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mudogramx's picture

You saved me $30

Submitted by mudogramx on February 21, 2006 - 12:58am.

Thanks MacIndows!

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madmax_2069's picture

they also have a irc server a

Submitted by madmax_2069 on February 21, 2006 - 11:00am.

they also have a irc server and room and also have a java irc chat program to join the irc server and room

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