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NaokiS Level 1 Level 1 (0 points)



I was directed here to get better help with this topic. As the title says, I want to install OS9 onto my Digital Audio G4 tower but having little success. I have ttried various discs (9.0, 9.1, 9.2) and none let me install the OS. The best I can get is the "Welcome to Mac OS 9.1" before the bomb screen shows saying there was an unimplemented trap problem. To get that far I have to boot off of a 9.0 disc to get the Floppy and ? error before I change to a 9.1/9.2 disc to start the installer. If I try to boot from the 9.1 or 9.2 discs directly, my Mac complains that there's no bootable medium. I have tried various images and even retail discs (including one that came with the original OSX package) to no avail.


Is there anyone that can help?




Power Macintosh G4 Digital Audio, Mac OS X (10.5.8)
  • a brody Level 9 Level 9 (64,275 points)

    Make sure your 1/2 AA 3.6V PRAM battery is under 4 years old. Make sure you are in fact using a Digital Audio:

    The Digital Audio never officially supported 10.5. If you used LeopardAssist to install 10.5 on it, double check with LeopardAssist's author that didn't affect your ability to use 9 with it, since 10.5 is not compatible with Classic, but is compatible with dual booting into Classic. 

    If the Mac has a third party processor upgrade, the firmware may have affected its ability to use 9. 

    Use this article to determine which versions of 9 CD can work with your Mac, once you have identified your Mac accurately with HT3082:

    Make sure your 9 retail copy says in black text the version of 9 that is newer than the minimum shown in the article:

    9(.0), 9.0.2, 9.0.4, 9.1, 9.2.1 are all retail releases in the sequence of release.

    The 9 CD has an orange 9 logo with a white background, and does not Upgrade, or Dropin on it, or any Mac model on it. Lastly, verify the startup manager can see the 9 CD after being inserted:

    And the curly arrow is clicked on it. If it doesn't see the CD, then it is not compatible.

  • NaokiS Level 1 Level 1 (0 points)

    I installed OSX 10.5 using a Quicksilver machine which had the ability to and then swapped the harddrive over to the Digital Audio.


    It says in the article that it originally came with 9.1, and my CD says that aswell.


    The only CD it says will boot is the one which will show up with a floppy icon.

  • a brody Level 9 Level 9 (64,275 points)

    If the PowerMac G4 machine originally came with 9.1, you must either use the 9.1 PowerMac G4 installer disc, or the 9.2.1 retail.  There are no other alternative versions of 9 that will work with it.

  • NaokiS Level 1 Level 1 (0 points)

    I've tried both now and still I can only get as far as the floppy disk icon...

  • a brody Level 9 Level 9 (64,275 points)

    Is your PRAM battery younger than 4 years as I had mentioned earlier?  That's one thing you didn't respond to.

  • NaokiS Level 1 Level 1 (0 points)

    I wouldn't have a clue. It's likely it's the original battery but it's still holding a decent charge when I probed it with my multimeter

  • a brody Level 9 Level 9 (64,275 points)

    When you say decent, if it is anything under 3.6V, it isn't enough.  Get it replaced from Radio Shack.

  • NaokiS Level 1 Level 1 (0 points)

    Though I can't be entirely certain it is 3.6v since I'm using an analogue meter, I believe it is 3.6

  • a brody Level 9 Level 9 (64,275 points)

    You've spent this much time on it.  Isn't it worth $15 of your cash to be certain?

  • NaokiS Level 1 Level 1 (0 points)

    No because I don't have cash to waste if this doesn't work. Why would the battery even cause an issue and if so, are you definatly sure that changing to a brand new one will stop this floppy icon problem?

  • Jeff Kelleher Level 4 Level 4 (3,015 points)

    Changing the battery is a troubleshooting step. It's really tough(or at least slow) to diagnose issues over the internet to begin with. An old computer could have a dead battery - if the battery is bad, all bets are off. There could certaily be other issues, and replacing the battery may do no good at all, but you have to eliminate all possible pints of failure, and the battery is certainly a possiibility,


    If you do get OS 9 to work, you're not giong to be very happy with the results, unless there is an old app you need to use.

    Web surfing, and the internet in general,  will not be fun. There are no modern browsers that I know of for OS 9, and most web sites are desogned for modern browsers.


    using OS 9, at this point, is sort of like using an old car, but not as much fun. You'll spend time and money making it work, and you do it just because you can and you want to. With an old car, you can still get where you're going, and enjoy doing it. With an old computer, you can make it work, but you may not get anywhere, and you may not enjoy it. Both wil cost you more money that it''s worth.

  • NaokiS Level 1 Level 1 (0 points)

    I'll try changing it when I have the money to.


    I'm not trying to use OS9 for a practicality stand point, more from an interest point of view. I used to use System 6 for no other reason but than I could.

  • NaokiS Level 1 Level 1 (0 points)

    No, I changed the battery to one known to be 3.6v and whilst some discs seem to boot now, still, floppy error.

  • a brody Level 9 Level 9 (64,275 points)

    Well no one can help you until you finish troubleshooting.

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