Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

So I'm dual-booting Ubuntu 12.04.1 on my iMac G5 powepc alongside Mac OS X and I want to add a boot cd option to yaboot because I'm trying to boot a scratched Mac OS X installation DVD that takes a while to read and the frst bootstrap moves on too fast. How do I edit the timeout for the first bootstrap anyways?

So, my main question is, how do I add a cd booting option to yaboot and then, how doI boot it? The devalias from OpenFrmware tells me that 1 have 2 cd-rom instaled, on is /ht/pci@3/ata-6/disk@0 and the other on ends with a 1 instead of a zero.

These are the contents of my yaboot.conf file:

yaboot.conf generated by the Ubuntu installer
run: "man yaboot.conf" for details. Do not make changes until you have!!
see also: /usr/share/doc/yaboot/examples for example configurations.
For a dual-boot menu, add one or more of:
bsd=/dev/hdaX, macos=/dev/hdaY, macosx=/dev/hdaZ


    append="quiet splash"

What do I add here so that yaboot will boot from my cd in like 3 minutes after startup?


share|improve this question
up vote 0 down vote accepted

I finally realized that it was my drive that wasn't reading the DVD and that the "enablecdboot" line in my yaboot configuration file was all I needed in order to boot from a CD. "enableofboot" also gives me an OpenFirmware boot option if I add it to the yaboot.conf!

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.