You could have a Tiger CD failure, I installed tiger yesterday on a customers Sage iMac, and have a graphite in the shop on running tiger. The machine was running system 9.0 I installed System 9.2.2 as the The Firmware update required 9.1 or better. I used Firmware update 4.1.9f1 then installed Tiger and everything worked fine. On Jul 1, 2005, at 9:05 AM, Eric F Crist wrote: > This isn't a book. This is an iMac, one of those colorful ones. > It's graphite, with built-in fire wire. > >> 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? >> >>> >>> 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. Ralph Lewis www.mac-care.com maccare at gwi.net QuickSilver G4 - Dual 800, 1.25G RAM, OSX 10.4, 22" Cinema Display