I do not have the original installation discs, but I do have a set of genuine iMac Software Install and Software Restore for iMac DV Models. The computer is running fine, but I thought it would be useful to know whether these disks would do the job in the event of my having a problem. After loading the Software Install disk and going the iMac install CD folder and selecting Mac OS Install I get a message " Your Mac's firmware is out of date, please update it before continuing".. Questions: 1. Is there any problem in using his disc with my 8.5 iMac? 2. Where can I download the firmware from? 3.Was the DV an update on OS 8.5? Many thanks if you could assist.