I think Tiger will only install with machines that have built-in Firewire. Thus, it may just be that your book may be too old? Jean-Paul On 7/1/05, Eric F Crist <ecrist at secure-computing.net> wrote: > Hello List, > > I just acquired an iMac DV with a 500 MHz G3, 256MB ram, and a 30GB > HD. I'm trying to install Mac OS 10.4, but the system keeps failing > about 95% of the way through. I have the software restore disks that > were original with the system and I have fully restored the original > software. From the web pages I've browsed, I need to update from > 9.0.4 to 9.1 and then upgrade to the 5.4.1 firmware version. > > All of these items seem to have completed successfully, but my OS > 10.4 installation continues to fail. > > Anyone know what's up? >