Updating firmware on an imac opi dating
"But we're seeing cases where people have done what they’d been told, installed these patches, and there were no user warnings that they were still running the wrong version of EFI ...
Your software can be secure while your firmware is insecure, and you're completely blind to that."A modern computer's EFI, like BIOS in older computers, is the embryonic code that tells a computer how to launch its own operating system.
If you are using Mac OS X you must boot from a local Mac OS 9.1 or 9.2 writeable partition (not a CD, or network disk) prior to following the update instructions.
This is the firmware that runs before your PC's operating system boots and has the potential to corrupt practically everything else that happens on your machine.
Duo found that even Macs with perfectly updated operating systems often have much older EFI code, due to either Apple's neglecting to push out EFI updates to those machines or failing to warn users when their firmware update hits a technical glitch and silently fails.
Note: After you install this update, the parameter RAM (PRAM) is reset.
This may reset some of your control panels to default settings.