hoakley Macs, Technology

Which firmware should your Mac be using? (version 10, Tahoe)

This article lists the firmware versions of Macs that have been successfully upgraded to run macOS 26.1 Tahoe.

Apple doesn’t provide an official list of the current firmware versions which should be installed on each model of Mac. Intel models with T2 chips consist of two parts, the second covering iBridge in the T2. Apple silicon Macs just give an iBoot version.

Macs still running older versions of macOS are covered by information at:

Apple silicon Macs

The current iBoot version is 13822.41.1.

Intel Macs with T2 chips

The current EFI version is 2094.40.1.0.0 and iBridge is 23.16.11072.0.0,0.

Apple Studio Display

The current version remains 17.0 (build 21A329).

How to check your Mac’s firmware version

The simplest way is to run my free tool SilentKnight, available from its product page.

Alternatively, use the About This Mac command at the top of the Apple menu; hold the Option key and click on the System Information command. In the Hardware Overview listing, this is given as the Boot ROM Version or System Firmware Version.

What to do if your Mac’s firmware is different from that shown

If the version is higher than that given here, it indicates that Mac has installed a more recent version of macOS, which has installed a later version of the firmware. This is almost invariably the result of installing a beta-release of the next version of macOS. This occurs even when the newer macOS is installed to an external disk.

If the installed version of firmware has a version lower than that shown, you can try installing macOS again to see if that updates the firmware correctly. If it still fails to update, you should contact Apple Support.

Firmware updaters are now only distributed as part of macOS updates and upgrades: Apple doesn’t provide them separately.

All T2 and Apple silicon models automatically check the integrity of their firmware in the early part of the boot process anyway. If any errors are found then, the Mac should be put into DFU mode and firmware restored from the current IPSW image file. In Sonoma and later this can be performed in the Finder, and no longer requires Apple Configurator 2. Full instructions are provided in this article. If you don’t have a second Mac or don’t feel that you can perform this yourself, it should be easy to arrange with an Apple store or authorised service provider.

(Last updated 10 November 2025 for 26.1)