Apple has released an update to macOS Tahoe bringing it to version 26.3.1. This adds support for its new Studio Display announced earlier this week. It’s also claimed to contain “bug fixes”, although none are detailed.

Download size for Apple silicon Macs is around 3 GB.

There are no published CVE entries for this update, so no publicly known security vulnerabilities are claimed to have been addressed.

This version has a build number of 25D2128, and there’s no change in iBoot firmware, which remains at 13822.81.10.

Looking at changes in bundled apps, there’s only one small increment in build and version numbers, in Passwords, which rises from version 2.3 to 2.3.1. Safari goes up a single build increment from 26.3 (21623.2.7.11.6) to 26.3.1 (21623.2.7.11.7).

In /System/Library, almost all the changes are in kernel extensions added to support the new Studio Displays. These include:

• AGXFirmwareKextG17PRTBuddy and AGXFirmwareKextG17XRTBuddy, AGXG17P and AGXG17X, AGXMetalG17P and AGXMetalG17X
• AlphaCentauriManager, AppleJHL9480FirmwareUpdater, AppleMobileDispT605X-DCP
• nine new AppleT6050 kexts, and an AppleT8080SOCTuner
• three additional AppleT8140 kexts
• an additional T6050TypeCPhy plugin to AppleTypeCPhy kext
• AppleVL822FirmwareUpdater
• AppleXHCFFirmwareDriver
• WLANDriver kext
• there’s an additional plugin to AppleEmbeddedAudio.

There’s also a new app in CoreServices, Medical Imaging Calibrator, and new DriverExtensions AppleCentauriAlpha, AppleCentauriBeta and AppleCentauriControl. Several private frameworks have been added, and others updated, presumably to provide access to the features of the new displays.

Clearly, Apple’s internal name for these new displays is Centauri.

Last updated at 20:15 GMT 4 March 2026.