Thanks very much for that. I have been in contact with OWC and their technical people told me that in order to successfully install a new processor, I must first update my OS 10 system firmware to 4.2.8. This must be done via Mac OS 9.1 (or higher), using a 'local' disk for startup – not via Classic or from a CD application. I have a CD version of OS 9.2.2 but I cannot see a way of booting from it. Any ideas?
Many thanks
Dave
Powermac G4 533 MHz (single) running OS 10.3.9 and Classic OS 9.2.2.
Intel Imac 1.83 MHz running OS 10.5.