Booting from a USB drive on a PowerPC | MacRumors Forums
Mac OS 9 Booting and Installing for Beginers
Booting a iBook G4 off a USB stick - YouTube
Booting from a USB drive on a PowerPC | MacRumors Forums
Got a PowerBook G4 titanium today. I am trying to install OS X Jaguar but the optical drive is non-functioning. Is there any way to instal either OS 9 or Jaguar without being able to insert a disc? I know later macs can boot from USB. : r/VintageApple
Upgrading & Booting an iBook G4 from a USB Flash Drive
令和に捨てる寸前のiBook G4の活用を試みて失敗した記録 - Qiita
How do I make my 1.5 GHz PowerBook G4 boot from a USB stick? - Ask Different