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| Mac OS 10.4 Install DVD not recognized in boot menu on PowerMac G4 MDD |
Posted by: chiggen on 2024-08-28 20:00:24
I have a PowerMac G4 MDD with Leopard currently installed. I'm trying to downgrade to Tiger by booting the install DVD. I have burned three copies of the DVD. All of the DVDs are recognized in the Leopard install, but going to the boot menu shows the HDD but not the DVD, any of the three I booted. Holding "C" on boot to try to make it boot the DVD just makes it boot into the existing Leopard install. How can I fix this? Does the firmware not want to recognize the DVD because I already have a newer Mac OS install? |
Posted by: MrFahrenheit on 2024-08-28 20:06:04
Which image file did you burn to your DVDs?
How did you burn it? |
Posted by: chiggen on 2024-08-28 20:14:07
I've noticed that this seems to be the same or similar to this thread but that thread does not have an answer |
Posted by: chiggen on 2024-08-28 20:15:47
Which image file did you burn to your DVDs?
How did you burn it? I burned this image as it was the most popular on internet archive using brasero on a macbook air running debian 12 with an asus dvd-rw |
Posted by: chiggen on 2024-08-28 20:18:51
disk utility says the dvds are okay |
Posted by: MrFahrenheit on 2024-08-28 20:48:00
disk utility says the dvds are okay
They might be missing the necessary boot blocks and drivers in the boot sector of the image, which could make them unbootable.
I haven’t checked those particular images but it is common for images uploaded online to be bad and not be bootable.
If you have one more DVD you can try downloading and burning this one:
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Posted by: chiggen on 2024-08-29 05:37:10
Yes! It worked! Thank you so much! |
Posted by: chiggen on 2024-08-29 06:14:48
Maybe it hasn't worked. The installer keeps saying something went wrong. I'm burning another DVD right now with the same installer to see if that one was bad. |
Posted by: chiggen on 2024-08-29 07:00:46
Burning the DVD again fixed it! Thanks again. |
Posted by: MrFahrenheit on 2024-08-29 08:18:26
Burning the DVD again fixed it! Thanks again.
Likely a few things
1. The other image lacks the proper boot sectors on the ISO image for booting.
2. Your DVD blanks aren't good quality.
3. Your burner is maybe going too fast or too slow to burn them well.
All 3 could be factors here. Glad you got it working. |
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