I have a Revision A iMac G3, and I burned Mac OS9 from my Macbook. I try to put the disc in and boot from disk, while holding C and it tries to read it then starts back into OS 8.5 and says "This disk is unreadable by this Computer. Do you want to initialize the disk? Name: untitled Format: ProDOS OK Any help here? It is a European copy, and I have a US iMac. Maybe that might be the issue ---------- And btw, I have tried many other copies of Mac OS (Mac OS 10.1 10.2, 10.3) and all say the same thing.