Six years ago, iBridge came for Macs with T2 chips, then 3 years ago Apple silicon models got iBoot instead of EFI. Now EFI support is dwindling fast.
firmware
No updates for Intel Macs without T2 chips, apart from the iMac19,1, and there only in Sonoma. T2 and Apple silicon models are more confusing, though.
This article lists the firmware versions of Macs that have been successfully upgraded to run macOS 14.8.2 Sonoma. […]
Is your Mac likely to receive firmware updates in future? How can you check whether its firmware is up to date? What happens in Sonoma?
Why do macOS updates keep updating firmware? Is it full of bugs or what? And just what does firmware do?
Some Intel Macs without T2 chips have firmware updates with last week’s security updates. Here are the details.
When run on Intel Macs without a T2 chip in Ventura 13.3.1, LockRattler may crash because of a bug in macOS. This update fixes it.
macOS Ventura 13.3, Monterey 12.6.4 and Big Sur 11.7.5 bring firmware updates for all supported Macs
This week’s updates to macOS 13.3, 12.6.4 and 11.7.5 should have updated the firmware of every supported Mac. […]
What should you do if a firmware update goes wrong? Here’s a guide to avoid panic, whether your Mac is Intel, has a T2, or M-series chip, and for Studio Displays.
Apple silicon Macs are better-equipped to prevent and deal with disaster. Restoring in DFU mode is extremely unusual, and more powerful than anything you can do with an Intel Mac.
The Eclectic Light Company 