Gives the latest firmware versions for all Macs running the most recent supported version of macOS, and which are expected to change in the future.
BridgeOS
A round-up of firmware updates across 15.4, 14.7.5 and 13.7.5, prospects for future macOS and firmware updates, and problems updating to 15.4.
Did you spot the change that didn’t take place as expected in the 15.2 update this week? It marks the end of the Intel era for Macs.
Why your Mac’s firmware version may not be the latest you expect. What you can do about that, depending on its type.
If you’ve been running pre-release firmware on your Mac’s T2 chip, trying to revert to a release version could brick it.
The Eclectic Light Company 