An important update for those expecting to update Apple silicon Macs to 26.4, as older versions may crash, and are expected to report firmware version errors.
firmware
How to read and interpret firmware version numbers from the first Intel Macs to the latest Apple silicon models.
Why should an app start crashing on launch in macOS 26.4 beta 2? Why does its firmware version number make no sense? And how did it take 6 months to fix six typos?
Details of new firmware versions for iMac 2019 models, those with T2 or Apple silicon chips. And how Apple assigns version numbers to iBoot.
Catch up on your reading with selected articles from the past year, covering hardware, firmware and Recovery, troubleshooting and updates.
Ten years ago, a firmware worm that could have inserted malware into Mac boot flash storage was demonstrated, and shortly afterwards many Macs were found to be running outdated firmware. We’ve come a long way since.
How to check secure boot, SIP, Gatekeeper/XProtect, its SSV, FileVault, macOS and its firmware, and XProtect Remediator scans.
Listing for all compatible Intel Macs with T2 chips, and all Apple silicon Macs.
Explains the sequence of events from Boot ROM to FileVault login, what storage is accessible at different times, and where the code is.
How to check your Mac is booting in Full Security, and how to read its log to verify all the key steps involved in that process.
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