435 Views 1 Reply Latest reply: Oct 15, 2007 6:57 AM by Dah•veed
Be very careful with firmware updates. They install differently and usually have specific instructions to follow to install correctly. At this point I would ignore Software Update (SU) and do it manually. First go to Apps/Utilities and see if SU has placed the installer there. If so, it may be corrupted so drag & drop it in the trash and flush it away. Then go to Apps/Utilities/Disk Utility/First Aid and select your startup disk and Repair Disk Permissions.
Next download the update from this link; iMac EFI Firmware Update 1.2.
Stop all other processes, disconnect any external FW/USB devices and devote the Mac to just installing this update; stop airport and bluetooth and just use a wired keyboard & mouse. Now read and know the directions for the install, including any restart instructions that may be required. When you are ready, do it.
After it is finished reconnect externals and restart any other processes and run SU for the iTunes update. I Repair Disk Permissions before and after all Apple updates and 3rd party updates that use an installer.