macOS Tahoe 26.6 Update! Everything you need to know.

macOS Tahoe 26.6 (25G72) is now Available For All Users!

UPDATED: 07/27/26

This article will be continually updated as new information comes in.

Today, Apple released macOS Tahoe 26.6 to the public. The update is available through Software Update in System Settings for all compatible Macs.

Apple’s release notes provide only a summary of the changes included in this update. As with previous macOS releases, many additional changes are uncovered through testing, system analysis, and comparing files between builds.

This article provides a detailed technical breakdown of macOS Tahoe 26.6, including new features, bug fixes, update sizes, firmware updates, security changes, developer updates, and other discoveries found while analyzing the release.

Apple mentions that the Tahoe 26.6 update will optimize the Spotlight index in preparation for macOS 27. Additionally a fix addressed where some notifications incorrectly displayed deprecation notices for some apps identified as Intel processor only. Also addressed was that HDR screenshots might appear garbled when sent in Messages.

macOS Tahoe Patch Notes Summary

1. New Features –
2. Developer Documented Fixes –
3. Security Fixes –
4. Enterprise Fixes –
5. Safari Security (Webkit) –
6. Safari –
7. Full installer & IPSW – Both Released
8. OpenCore Legacy Patcher Users – NOT COMPATIBLE!

System Settings > Software Update:

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OpenCore Legacy Patcher for Unsupported Macs

OCLP 2.4.1 & macOS Tahoe 26.6 : DO NOT INSTALL! NOT COMPATIBLE YET. This release is in full testing and it is not recommended that you attempt to install it yet.!

OCLP 2.4.1 Testing Status =

Kernel Debug Kit (KDK) Status: = https://github.com/dortania/KdkSupportPkg/releases

Metallibsupport Status: = https://github.com/dortania/MetallibSupportPkg/releases

Full Apple Update Release list

Update List 💻📲 ✅

Tahoe 26.6 release (25G72)
Sequoia 15.7.8 release (24G822)
Sonoma 14.8.8 release (23J619)
iOS/iPadOS 26.6 release (23G71)
iOS/iPadOS 18.7.9 release (22H355) (remains the same)
iPadOS 17.7.11 release (21H461) (remains the same)
iOS/iPadOS 16.7.16 release (20H392) (remains the same)
iOS/iPadOS 15.8.8 release (19H422) (remains the same)
watchOS 26.6 release (23U67)
homePodOS 26.6 release
tvOS 26.6 release (23L773)
visionOS 26.6 release (23O770)
Studio Display Firmware 26.4 (23E246) (remains the same)
Safari – 26.6
Xcode – 26.6
Command Line Tools for Xcode – 26.6

Security Vulnerabilities Patched

This is a list of all the CVE Security Vulnerabilities Patched:

1. macOS Tahoe Apple Links
2. macOS Tahoe Release History
3. macOS Tahoe Full Installer.app
4. Apple Silicon macOS Tahoe IPSW Restore file Database
5. macOS Tahoe Update sizes
6. Apple Silicon System Firmware Version
7. Apple Silicon OS loader Version (iBoot)
8. Intel T2 BridgeOS Update
9. Intel T2 Firmware Update
10. Safari Update
11. What’s new for enterprise in macOS Tahoe
12. Security Content of macOS Tahoe
13. macOS Tahoe Release Notes / Patch Notes / Changes
14. macOS Tahoe Developer Release Notes

Click “Continue Reading” for the rest of the article.

1. Apple macOS Tahoe Links

When Apple releases the official macOS Tahoe support links, they will be listed below.

What’s new in the updates for macOS Tahoe – https://support.apple.com/en-us/122868
What’s new for enterprise in macOS Tahoe – https://support.apple.com/en-us/124963
Apple Security Updates Page – https://support.apple.com/en-us/HT201222
macOS Tahoe Mac App Store link – Apple stopped creating a Mac App Store link for macOS Downloads. Sequoia was the final OS that has an App Store link.
macOS Tahoe features page – https://www.apple.com/macos/os/
Platform Security Guide – New macOS Tahoe Background Security Improvements or BSI.
Platform Guide Deployment – What’s new in Apple platform deployment

AppleSeed Notes Link = appleseed.apple.com/

Developer Public Link = developer.apple.com/documentation/macos-release-notes

macOS Deployment References Changes – https://support.apple.com/guide/deployment-reference-macos/document-revision-history-apd04dff7069/web

2. macOS Tahoe Final & Beta Release History

22. macOS Tahoe 26.6 (25G72) – 7/27/26
21. macOS Tahoe 26.5.2 (25F84) – 6/29/26
20. macOS Tahoe 26.5.1 (25F80) – 6/01/26
19. macOS Tahoe 26.5 (25F71) – 5/11/26
18. macOS Tahoe 26.4.1 (25E253) – 4/09/26
17. macOS Tahoe 26.4 (25E246) – 3/24/26
16. macOS Tahoe 26.3.1 (25D2128) – 3/4/26
15. macOS Tahoe 26.3 (25D125) – 2/11/26
14. macOS Tahoe 26.2 (25C56) – 12/12/25
13. macOS Tahoe 26.1 (25B78) – 11/03/25
12. macOS Tahoe 26.0.1 (25A362) – 10/29/25
11. macOS Tahoe 26.0.0 (25A354) – 10/15/25
10. macOS Tahoe 26 RC (25A353) – 10/09/25
9. macOS Tahoe 26 Beta 9 (25A5349a) – 10/02/25
8. macOS Tahoe 26 Beta 8 (25A5349a) – 9/25/25
7. macOS Tahoe 26 Beta 7 (25A5346a) – 8/18/25
6. macOS Tahoe 26 Beta 6 (25A5338b) – 8/11/25
5. macOS Tahoe 26 Beta 5 (25A5327h) – 8/07/25
4. macOS Tahoe 26 Beta 4 (25A5316i) – 7/22/25
3. macOS Tahoe 26 Beta 3 (25A5306g) – 7/07/25
2. macOS Tahoe 26 Beta 2 (25A5295e) – 6/23/25
1. macOS Tahoe 26 Beta 1 (25A5279m) – 6/09/25

3. macOS Tahoe Full Installer.app

Apple has released the full installer for macOS Tahoe. I list all the of the Full installers in the link below.

https://mrmacintosh.com/macos-tahoe-full-installer-database-download-directly-from-apple/

InstallAssistant.pkg = Full download. Installing this package will add the full “Install macOS Tahoe.app” to your applications folder.

4. Apple Silicon IPSW Restore file Update

Apple has released the full IPSW restore file of macOS for Apple Silicon Macs. I keep track of all of them in my Apple Silicon Firmware Database

Get them here –> https://mrmacintosh.com/apple-silicon-m1-full-macos-restore-ipsw-firmware-files-database/

5. macOS Tahoe Update sizes

Delta Update

The delta update will automatically change in size for exactly what your macOS version needs.

Full update & OCLP Users = NOT SUPPORTED YET

Apple Silicon Updates

Delta from macOS Tahoe 26.5.2 with size = 5.28GB
Upgrade from macOS Sequoia 15.7.7 with size = 10.16GB

Intel Updates

Delta Update from macOS Tahoe 26.5.2 with size = 2.98GB
Delta Update from macOS Tahoe 26.5.1 with size = 2.99GB

6. Apple Silicon System Firmware Version

This update has a new firmware update. The version number is reported in System Information under “System Firmware Version“. Also known as mBoot.

Apple Silicon Firmware =

22. macOS Tahoe 26.6 =
21. macOS Tahoe 26.5.2 = 18000.121.3
20. macOS Tahoe 26.5.1 = 18000.120.36
19. macOS Tahoe 26.5 = 18000.120.36
18. macOS Tahoe 26.4.1 = 18000.101.7
17. macOS Tahoe 26.4 = 18000.101.7
16. macOS Tahoe 26.3.1 = 13822.81.10
15. macOS Tahoe 26.3 = 13822.81.10
14. macOS Tahoe 26.2 = 13822.61.10
13. macOS Tahoe 26.1 = 13822.41.1
12. macOS Tahoe 26.0.1 = 13822.1.2
11. macOS Tahoe 26.0 = 13822.1.2
10. macOS Tahoe RC = 13822.1.2
9. macOS Tahoe Beta 9 = 13822.1.2
8. macOS Tahoe Beta 8 = 13822.1.2
7. macOS Tahoe Beta 7 = 13822.1.2
6. macOS Tahoe Beta 6 = 13822.1.2
5. macOS Tahoe Beta 5 = 13822.0.277.0.3
4. macOS Tahoe Beta 4 = 13822.0.233
3. macOS Tahoe Beta 3 = 13822.0.194.0.3
2. macOS Tahoe Beta 2 = 13822.0.166.0.1
1. macOS Tahoe Beta 1 = 13822.0.88.511.1

7. Apple Silicon OS loader Version (iBoot)

OS Loader Version (iBoot) also referred to as “iBoot second-stage loader”, is Apple’s stage 2 bootloader. The OS loader version will be the same as the “System Firmware Version” on the latest OS. On previous versions of macOS Monterey and Big Sur, the OS loader version will be a version behind. Example = Monterey = 7459.121.3 & Big Sur = 6723.140.2

OS Loader version =

22. macOS Tahoe 26.6 =
21. macOS Tahoe 26.5.2 = 18000.121.3
20. macOS Tahoe 26.5.1 = 18000.120.36
19. macOS Tahoe 26.5 = 18000.120.36
18. macOS Tahoe 26.4.1 = 18000.101.7
17. macOS Tahoe 26.4 = 18000.101.7
16. macOS Tahoe 26.3.1 = 13822.81.10
15. macOS Tahoe 26.3 = 13822.81.10
14. macOS Tahoe 26.2 = 13822.61.10
13. macOS Tahoe 26.1 = 13822.41.1
12. macOS Tahoe 26.0.1 = 13822.1.2
11. macOS Tahoe 26.0 = 13822.1.2
10. macOS Tahoe RC = 13822.1.2
9. macOS Tahoe Beta 9 = 13822.1.2
8. macOS Tahoe Beta 8 = 13822.1.2
7. macOS Tahoe Beta 7 = 13822.1.2
6. macOS Tahoe Beta 6 = 13822.1.2
5. macOS Tahoe Beta 5 = 13822.0.277.0.3
4. macOS Tahoe Beta 4 = 13822.0.233
3. macOS Tahoe Beta 3 = 13822.0.194.0.3
2. macOS Tahoe Beta 2 = 13822.0.166.0.1
1. macOS Tahoe Beta 1 = 13822.0.88.511.1

8. Intel T2 BridgeOS Update

The Version of BridgeOS for your T2 Security Chip (2018-2020 Intel Macs) was updated.

BridgeOS version = Updated!

22. macOS Tahoe 26.6 = 23.16.16068.0.0
21. macOS Tahoe 26.5.2 = 23.16.15067.0.0
20. macOS Tahoe 26.5.1 = 23.16.15067.0.0
19. macOS Tahoe 26.5 = 23.16.15067.0.0
18. macOS Tahoe 26.4.1 = 23.16.14242.0.0
17. macOS Tahoe 26.4 = 23.16.14242.0.0
16. macOS Tahoe 26.3.1 = 23.16.13120.0.0
15. macOS Tahoe 26.3 = 23.16.13120.0.0
14. macOS Tahoe 26.2 = 23.16.12048.0.0
13. macOS Tahoe 26.1 = 23.16.11072.0.0
12. macOS Tahoe 26.0.1 = 23.16.10350.0.0
11. macOS Tahoe 26.0 = 23.16.10350.0.0
10. macOS Tahoe RC = 23.16.10350.0.0
9. macOS Tahoe Beta 9 = 23.16.10350.0.0
8. macOS Tahoe Beta 8 = 23.16.10348.5.1
7. macOS Tahoe Beta 7 = 23.16.5342.0.1
6. macOS Tahoe Beta 6 = 23.16.5342.0.1
5. macOS Tahoe Beta 5 = 23.16.5331.0.4
4. macOS Tahoe Beta 4 = 23.16.5320.0.2
3. macOS Tahoe Beta 3 = N/A
2. macOS Tahoe Beta 2 = N/A
1. macOS Tahoe Beta 1 = 23.16.5283.0.7

9. Intel T2 Firmware Update

The System Firmware Version for your Mac (2019-2020)

Firmware version =

9. macOS Tahoe 26.6 =
8. macOS Tahoe 26.5.2 = 2103.100.6.0.0 (iBridge: 23.16.15067.0.0,0)
7. macOS Tahoe 26.5.1 = 2103.100.6.0.0 (iBridge: 23.16.15067.0.0,0)
6. macOS Tahoe 26.5 = 2103.100.6.0.0 (iBridge: 23.16.15067.0.0,0)
5. macOS Tahoe 26.4.1 = 2103.100.6.0.0 (iBridge: 23.16.14.242.0.0,0)
4. macOS Tahoe 26.4 = 2103.100.6.0.0 (iBridge: 23.16.14.242.0.0,0)
3. macOS Tahoe 26.3.1 = 2094.80.5.0.0 (iBridge: 23.16.13120.0.0,0)
2. macOS Tahoe 26.3 = 2094.80.5.0.0 (iBridge: 23.16.13120.0.0,0)
1. macOS Tahoe 26.2 = 2094.40.1.0.0 (iBridge: 23.16.12048.0.0,0)

10. Safari Update

The new version of Safari was 26 is included in the macOS 26 update.

Safari =

22. macOS Tahoe 26.6 = Safari 26.6
21. macOS Tahoe 26.5.2 = Safari 26.5.2 (21624.2.5.11.8)
20. macOS Tahoe 26.5.1 = Safari 26.5 (21624.2.5.11.4)
19. macOS Tahoe 26.5 = Safari 26.5 (21624.2.5.11.4)
18. macOS Tahoe 26.4.1 = Safari 26.4 (21624.1.16.11.4)
17. macOS Tahoe 26.4 = Safari 26.4 (21624.1.16.11.4)
16. macOS Tahoe 26.3.1 = Safari 26.3.1 (21623.2.7.11.7)
15. macOS Tahoe 26.3 = Safari 26.3 (21623.2.7.11.6)
14. macOS Tahoe 26.2 = Safari 26.2 (21623.1.14.11.9)
13. macOS Tahoe 26.1 = Safari 26.1 (info missing)
12. macOS Tahoe 26.0.1 = Safari 26.0.1 (21622.1.22.11.15)
11. macOS Tahoe 26.0 = Safari 26.0 (21622.1.22.11.14)
10. macOS Tahoe RC = Safari 26.0 (21622.1.22.11.14)
9. macOS Tahoe Beta 9 = Safari 26.0 (21622.1.22.11.13)
8. macOS Tahoe Beta 8 = Safari 26.0 (21622.1.22.11.12)
7. macOS Tahoe Beta 7 = Safari 26.0 (21622.1.22.11.11)
6. macOS Tahoe Beta 6 = Safari 26.0 (21622.1.22.11.5)
5. macOS Tahoe Beta 5 = Safari 26.0 (21622.1.21.11.3)
4. macOS Tahoe Beta 4 = Safari 26.0 (21622.1.19.11.2)
3. macOS Tahoe Beta 3 = Safari 26.0 (21622.1.18.1.5)
2. macOS Tahoe Beta 2 = Safari 26.0 (21622.1.16.11.2)
1. macOS Tahoe Beta 1 = Safari 26.0 (21622.1.14.11.4)

11. What’s new for Enterprise in Tahoe

Enterprise changes in macOS Tahoe 26.6

https://support.apple.com/en-us/124963

12. Security Content of macOS Tahoe

Security vulnerabilities in this Update

Fixes addressed in this update =

Safari (WebKit) =

https://support.apple.com/en-us/126794

https://support.apple.com/en-us/100100

13. macOS Tahoe Release Notes

macOS Tahoe 26.6 Update Patch Notes

This update provides security fixes for your Mac.

14 macOS Tahoe Developer Release Notes

This update also includes the following Developer enhancements and bug fixes:

Overview

The macOS 26.6 SDK provides support to develop apps for Mac computers running macOS Tahoe 26.6 RC. The SDK comes bundled with Xcode 26.6, available from the Mac App Store. For information on the compatibility requirements for Xcode 26.6, see Xcode 26.6 Release Notes.

CoreStorage

Deprecations

Encrypted HFS+ (CoreStorage) is deprecated and will not be supported in macOS 28. If you use Encrypted HFS+ backups on external drives, begin backing up to encrypted APFS-formatted external drives instead. (175892336)

Ecosystem

Resolved Issues

Fixed: macOS deprecation notifications incorrectly identify a host app as Intel-only when a system plugin loader, such as a Color Picker or Print Dialog Extension, loads x86 code into the host process. (174841181) (FB22512943)

HealthKit

Resolved Issues

Fixed: Temporally-weighted average statistics queries for discrete quantity types such as Resting Heart Rate may return erroneously high values when samples overlap in time. (178157672)

Messages

Resolved Issues

Fixed: HDR screenshots might appear garbled when sent in Messages. (180859837)

https://developer.apple.com/documentation/macos-release-notes

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macOS Tahoe 26.6 (25G72) is now Available For All Users!

macOS Tahoe Patch Notes Summary

System Settings > Software Update:

OpenCore Legacy Patcher for Unsupported Macs

Full Apple Update Release list

Security Vulnerabilities Patched

Table of Contents

1. Apple macOS Tahoe Links

2. macOS Tahoe Final & Beta Release History

3. macOS Tahoe Full Installer.app

4. Apple Silicon IPSW Restore file Update

5. macOS Tahoe Update sizes

Delta Update

6. Apple Silicon System Firmware Version

7. Apple Silicon OS loader Version (iBoot)

8. Intel T2 BridgeOS Update

9. Intel T2 Firmware Update

10. Safari Update

11. What’s new for Enterprise in Tahoe

12. Security Content of macOS Tahoe

13. macOS Tahoe Release Notes

14 macOS Tahoe Developer Release Notes