I'm using an iMac Intel Core 2 Duo. Software Update keeps prompting me that there is an available update (iMac EFI Firmware Update v1.3) to install. The notes says that upon successful application, the BootROM will be IM71.007A.B03 (while my current BootROM is IM71.007A.B01). No matter how many times I install this update and rebooting my machine subsequently, I can never get it the BootROM to bump up to .B03 and the update continues to remain to be updated. What is wrong? Thanks for all help.