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Which firmware should your Mac be using? (version 7)

List of current versions of firmware for all models of Mac supported by Ventura, following upgrading to Ventura.

November 3, 2022 Macs, Technology

Firmware on the change: 1 Out with the old

Since replacing Open Firmware in 2006, EFI firmware has undergone major change. Now only installed as part of a macOS install or update, here’s its story.

March 13, 2022 Macs, Technology

Which firmware should your Mac be using? (version 6)

This article lists the firmware versions of Macs which have been successfully updated to run macOS 12.6.3. Apple […]

September 2, 2021 Macs, Technology

Why is firmware so troubled?

The last five years have seen great changes in Mac firmware security. As Intel Macs are replaced by Apple Silicon models, firmware may at last be simpler and more secure at last.

March 8, 2021 Macs, Technology

Which firmware should your Mac be using? (version 5)

macOS 11.7.3 Big Sur brings firmware updates for some supported models. This article lists the firmware versions of […]

November 16, 2020 Macs, Technology

Firmware fundamentals

Essential facts about the firmware in your Mac, how it’s updated, and which version you should be running. With links to more detailed articles.

September 15, 2020 Macs, Technology

Achieving the CIS Apple macOS 10.15 Benchmark

If you’re working towards this benchmark (or those for earlier versions of macOS), or want to maintain systems to its requirements, I have something to help you.

September 4, 2020 Macs, Technology

Firmware updates and the iMac Retina 5K 27-inch Late 2015 (iMac17,1)

What is wrong with this iMac, which has such a struggle updating its firmware? And why is Apple not acknowledging the problem?

July 23, 2020 Macs, Technology

Some Macs don’t update their firmware when they should

Have you checked whether your Mac is running the latest version of firmware? For some iMacs, that might bring an unwelcome surprise.

March 30, 2020 Macs, Technology

A plain guide to Mac firmware and its problems

There are three software systems at the heart of every Mac: its firmware (‘EFI firmware’), the system kernel, […]

October 31, 2019 Macs, Technology

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