What is wrong with this iMac, which has such a struggle updating its firmware? And why is Apple not acknowledging the problem?
EFI
What do you know about the hidden and unmounted EFI partition on all the disks you use with your Mac? It could be very important.
The macOS 10.15.4 Supplemental Update released on 8 April 2020 isn’t a small update by any means, at […]
Apple has released macOS 10.15.4 Supplemental Update, an out-of-cycle update which fixes: problems taking part in FaceTime calls […]
A couple of important issues to be aware of when using SilentKnight or LockRattler.
Have you checked whether your Mac is running the latest version of firmware? For some iMacs, that might bring an unwelcome surprise.
Many users of iMac 17,1 models – described officially as the iMac Retina 5K 27-inch Late 2015 – […]
Now that Sierra is unsupported, this update no longer marks its older firmware versions as being errors.
Updates now distinguish between firmware versions for High Sierra and Mojave, and those for Catalina. Recommended for all users.
There are three software systems at the heart of every Mac: its firmware (‘EFI firmware’), the system kernel, […]
The Eclectic Light Company 