I'm trying to install Ubuntu on an external USB hard drive but I can't install Yaboot.
My Mac is a PowerPC G4 iMac flat panel.
I know that it's possible to boot on USB using open firmware and I know how to do it, but since Yaboot is not installed when I try to boot on this external USB drive I get a not possible symbol with a grey background on the screen.
I'd like to install Yaboot on the external drive but I can't mount it on OS X (I have a bad superblock error).
When I try
sudo mount_hfs /dev/disk1s3 /Volumes/1, I get this message:
mount_hfs: Invalid argument
If I could mount this volume I could generate the Yaboot config file.
I tried to use DiskWarrior but I can't see this external USB hard drive on it.