Thus spake Tim O'Leary <t_oleary at vocrehab.state.ne.us>, circa 3/14/2003: > We went through this as well with some new 17" iMacs. It will only boot to > an image of the OS that matches the one on the CD it came with. If you > want to have a firewire handy to use for emergency situations, you will need > to install the OS on the FireWire from the OS cd that came with the iMac. I haven't tried this, but you should be able to "clone" your internal HD from the boot disk with Carbon Copy Cloner and boot from that.