I am in a pickle! I only have my Powerbook G4 12' to make a bootable linux usb, I don't have any idea how to do this, is their a transferable program that'd do the same in the likes as "rufus, echter", I am trying to put Ubuntu 18.04 on an usb within Mac Os 10.4. Thank you! This is for use for another computer to keep clear, the computer I have is having issues so making a usb would help me tremendously. Thank you again.