Mr. Macintosh - Apple Mac Enterprise IT Blog & macOS MacAdmins News

macOS Tahoe 26.5.1 Update! Everything you need to know.

macOS Tahoe 26.5.1 (25F80) is now Available For All Users!

UPDATED: 06/02/26

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

Apple just released the 3rd minor update for macOS Tahoe to the public! Let’s jump in and find out what’s new.

This update is a very small point release that shows the following notes:

The 26.5.1 Update includes the following:

This update addresses an issue for enterprise users where Macs with an M5 chip could unexpectedly shut down when using certain content filtering network extensions.

This update appears to only fix one issue with M5 Macs. The update is available for ALL macOS Tahoe supported Macs. The update also does not have any published CVE Security fixes listed on Apple’s Security Update page.

macOS Tahoe Patch Notes Summary

1. New Features – 0
2. Developer Documented Fixes – 0
3. Security Fixes – 0
4. Enterprise Fixes – 1
5. Safari Security (Webkit) – 0
6. Safari – No update
7. Full installer & IPSW – Both Released
8. OpenCore Legacy Patcher Users – NOT COMPATIBLE!

OpenCore Legacy Patcher for Unsupported Macs

OCLP 2.4.1 & macOS Tahoe 26.5.1 : 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 26.5.1 release (25F80) (NEW)
Sequoia 15.7.7 release (24G720) (remains the same)
Sonoma 14.8.7 release (23J520) (remains the same)
iOS/iPadOS 26.5.1 release (23F81) (NEW) iPhone 17 & Air ONLY
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 26.5 release (23T570) (remains the same)
homePodOS 26.5 release (23L471) (remains the same)
tvOS 26.5 release (23L471) (remains the same)
visionOS 26.5 release (23O471) (remains the same)
Studio Display Firmware 26.4 (23E246) (remains the same)
Safari – 26.5 (21624.2.5.11.4)
Xcode – 26.5
Command Line Tools for Xcode – 26.5

Security Vulnerabilities Patched

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

Tahoe 26.5.1 – 0 NEW (No CVE’s listed)
Sequoia 15.7.7 – 45 CVEs Patched (Remains same release)
Sonoma 14.8.7 – 42 CVEs Patched (Remains same release)
iOS/iPadOS 26.5.1 -0 NEW (No CVE’s listed)
iOS/iPadOS 18.7.9 – 47 CVEs Patched (Remains same release)
iPadOS 17.7.11 – 1 CVE Patched (Remains same release)
iOS/iPadOS 16.7.16 – 1 CVE Patched (Remains same release)
iOS/iPadOS 15.8.8 – 1 CVE Patched (Remains same release)
watchOS 26.5 – 43 CVEs Patched (Remains same release)
tvOS 26.5 – 46 CVEs Patched (Remains same release)
visionOS 26.5 – 48 CVEs Patched (Remains same release)

This information was provided by MacAdmin Tony Young - Thank You!

NOTE: I hate website ads, but this one small google ad below helps me with the cost of running Mr. Macintosh.com. Thank you

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.

macOS Tahoe 26.5 Update! Everything you need to know.

macOS Tahoe 26.5 (25F71) is now Available For All Users!

UPDATED: 05/12/26

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

Apple just released the 5th major update for macOS Tahoe to the public! Let’s jump in and find out what’s new.

This update is a large point release update that shows the following notes:

The 26.5 Update includes the following:

“This update includes enhancements, bug fixes and security updates for your Mac”

NOTE: Apple did not list the below two updates. Thank you to @Dhinak for grabbing the info. The MagSafe info was provided in the Apple Developer Forum.

Suggested Places in Maps displays recommendations based on what’s trending nearby and your recent searches
Power control setting in Energy for Mac mini, Mac Studio, and iMac enables you to power off or restart your Mac using assistive accessories like switches
MagSafe Power adapter color will now show green if the battery charge limit is set and the Mac is fully charged =
The light should now turn green when the device reaches the charging limit.
The light should now turn back to amber if/when power drain causes charging to resume.
developer.apple/com/forum/thread/822390

macOS Tahoe Patch Notes Summary

1. New Features – 3*
2. Developer Documented Fixes – 8
3. Security Fixes – 79
4. Enterprise Fixes – 8
5. Safari Security (Webkit) –
6. Safari – Updated – 26.5
7. Full installer & IPSW – Both Released
8. OpenCore Legacy Patcher Users – NOT COMPATIBLE!

OpenCore Legacy Patcher for Unsupported Macs

OCLP 2.4.1 & macOS Tahoe 26.5 : 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 26.5 release (25F71) (same as RC)
Sequoia 15.7.7 release (24G720) (same as RC)
Sonoma 14.8.7 release (23J520) (same as RC)
iOS/iPadOS 26.5 release (23F77) (same as RC)
iOS/iPadOS 18.7.9 release (22H355) (same as RC)
iPadOS 17.7.11 release (21H461)
iOS/iPadOS 16.7.16 release (20H392)
iOS/iPadOS 15.8.8 release (19H422)
watchOS 26.5 release (23T570) (same as RC)
homePodOS 26.5 release (23L471) (same as RC)
tvOS 26.5 release (23L471) (same as RC)
visionOS 26.5 release (23O471) (same as RC) (edited)
Studio Display Firmware 26.4 (23E246)
Safari – 26.5 (21624.2.5.11.4)
Xcode – 26.4
Command Line Tools for Xcode – 26.4
This information was provided by Dhinak - Thank You!

Security Vulnerabilities Patched

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

Tahoe 26.5 – 79 CVEs Patched
Sequoia 15.7.7 – 45 CVEs Patched
Sonoma 14.8.7 – 42 CVEs Patched
iOS/iPadOS 26.5 – 61 CVEs Patched
iOS/iPadOS 18.7.9 – 47 CVEs Patched
iPadOS 17.7.11 – 1 CVE Patched
iOS/iPadOS 16.7.16 – 1 CVE Patched
iOS/iPadOS 15.8.8 – 1 CVE Patched
watchOS 26.5 – 43 CVEs Patched
tvOS 26.5 – 46 CVEs Patched
visionOS 26.5 – 48 CVEs Patched

This information was provided by MacAdmin Tony Young - Thank You!

NOTE: I hate website ads, but this one small google ad below helps me with the cost of running Mr. Macintosh.com. Thank you

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.

macOS Tahoe 26.4.1 Update! Everything you need to know.

macOS Tahoe 26.4.1 (25E253) is now Available For All Users!

UPDATED: 04/15/26

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

Apple just released the 3rd minor update for macOS Tahoe to the public! Let’s jump in and find out what’s new.

This update is a point release update that shows the following notes: This update provides bug fixes for your Mac.

As you know, we do not just accept that so we have to dig a little deeper. If you take a look at “What’s new in Enterprise for macOS Tahoe 26” we will see the actual fix:

“Resolved an issue where MacBook Air with M5 and MacBook Pro with M5 Pro or M5 Max failed to join 802.1X Wi-Fi networks while using content filter extensions.”

macOS Tahoe Patch Notes Summary

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

OpenCore Legacy Patcher for Unsupported Macs

OCLP 2.4.1 & macOS Tahoe 26.4.1 : 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 💻📲 ✅

macOS Tahoe 26.4.1 (25E253)
macOS Sequoia 15.7.5 (24G624) – Same Version
macOS Sonoma 14.8.5 (23J423) – Same Version
iOS 26.4.1 (23E254) – Released Yesterday
iPadOS 26.4.1 (23E254) – Released Yesterday
iOS 18.7.7 (22H333) – Same Version
watchOS 26.4 (23T239) – Same Version
watchOS 8.8.2 (19U526) – Same Version
watchOS 5.3.10 (16U711) – Same Version
homePodOS 26.4 (23L243) – Same Version
tvOS 26.4 (23L243) – Same Version
visionOS 26.4 (23O247) – Same Version
Studio Display Firmware 26.4 (23E246)
Safari – 26.4 (21624.1.16.11.4)
Xcode – 26.4
Command Line Tools for Xcode – 26.4

NOTE: I hate website ads, but this one small google ad below helps me with the cost of running Mr. Macintosh.com. Thank you

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.

macOS Tahoe 26.4 Update! Everything you need to know.

macOS Tahoe 26.4 (25E246) is now Available For All Users!

UPDATED: 03/31/26

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

Apple just released the 4th major update for macOS Tahoe to the public! Let’s jump in and find out what’s new.

This isn’t just a routine update. It will most likely be the final major feature release for macOS Tahoe. After what MacAdmins call the “Spring Release,” most development work usually shifts to the next OS, macOS 27, ahead of its debut in June at WWDC26.

macOS Tahoe Patch Notes Summary

1. New Features – 7
2. Developer Documented Fixes –
3. Security Fixes – 64
4. Enterprise Fixes – 12
5. Safari Security (Webkit) – 7
6. Safari – 26.4
7. Full installer & IPSW – Both Released
8. OpenCore Legacy Patcher Users – NOT COMPATIBLE!

OpenCore Legacy Patcher for Unsupported Macs

OCLP 2.4.1 & macOS Tahoe 26.4 : 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 💻📲 ✅

macOS Tahoe 26.4 (25E246)
macOS Sequoia 15.7.5 (24G624)
macOS Sonoma 14.8.5 (23J423)
iOS 26.4 (23E246)
iPadOS 26.4 (23E246)
iOS 18.7.7 (22H333)
watchOS 26.4 (23T239)
watchOS 8.8.2 (19U526)
watchOS 5.3.10 (16U711)
homePodOS 26.4 (23L243)
tvOS 26.4 (23L243)
visionOS 26.4 (23O247)
Studio Display Firmware 26.4 (23E246)
Safari – 26.4 (21624.1.16.11.4)
Xcode – 26.4
Command Line Tools for Xcode – 26.4

NOTE: I hate website ads, but this one small google ad below helps me with the cost of running Mr. Macintosh.com. Thank you

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.

macOS Tahoe 26.3.1 Update! Everything you need to know.

macOS Tahoe 26.3.1 (25D2128) is now Available For All Users!

UPDATED: 03/06/26

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

Apple just released the 2nd minor update for macOS Tahoe to the public! Let’s jump in and find out what’s new.

New MacBook Neo Wallpaper!

New MacBook Neo Wallpaper! If you update to Tahoe 26.3.1 you can now select one of four new Neo specific wallpapers that were shown in the introduction!

macOS Tahoe Patch Notes Summary

1. Public Documented New Features – 0
2. Public Documented Bug Fixes – “Bug Fixes”
3. Developer Documented Fixes – 0
3. Security Fixes – 0
4. Enterprise Fixes – 0
5. Safari Security (Webkit) -0
7. Safari – 26.3.1
6. Full installer & IPSW – Both Released
7. OpenCore Legacy Patcher Users – NOT COMPATIBLE!

OpenCore Legacy Patcher for Unsupported Macs

OCLP 2.4.1 & macOS Tahoe 26.3.1 : 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 💻📲 ✅

macOS Tahoe 26.3.1 (25D2128)
iOS 26.3.1 (23D8133)
iPadOS 26.3.1 (23D8133)
iOS 18.7.6 (22H320)
Studio Display Firmware 26.3 (23D8128)
Safari – none for Sequoia or Sonoma
Xcode – Xcode 26.3
Command Line Tools for Xcode – Xcode 26.3 Command Line Tools

NOTE: I hate website ads, but this one small google ad below helps me with the cost of running Mr. Macintosh.com. Thank you

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.

macOS Tahoe 26.3 Update! Everything you need to know.

macOS Tahoe 26.3 (25D125) is now Available For All Users!

UPDATED: 02/12/26

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

Apple just released the 3rd major update for macOS Tahoe to the public! Let’s jump in and find out what’s new.

macOS Tahoe Patch Notes Summary

1. Public Documented New Features – None listed by Apple
2. Public Documented Bug Fixes – “Bug Fixes” listed who knows
3. Developer Documented Fixes – 1
3. Security Fixes – 55 CVE’s addressed
4. Enterprise Fixes – 3
5. Safari Security (Webkit) –
7. Safari – 26.3 (21623.2.7.11.6)
6. Full installer & IPSW – Both full installer and IPSW released for 26.3
7. OpenCore Legacy Patcher Users – NOT COMPATIBLE!

OpenCore Legacy Patcher for Unsupported Macs

OCLP 2.4.1 & macOS Tahoe 26.3 : 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 = in progress

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 26.3 (25D125)
Sequoia 15.7.4 (24G517)
Sonoma 14.8.4 (23J319)
iOS & iPadOS 26.3 (23D127)
iOS & iPadOS 18.7.5 (22H311)
homePodOS 26.3 (23K620)
tvOS 26.3 (23K620)
watchOS 26.3 (23S620)
visionOS 26.3 (23N620)
Safari – 26.3
Xcode – Xcode 26.2 still old version
Command Line Tools for Xcode – Xcode 26.2 Command Line Tools

NOTE: I hate website ads, but this one small google ad below helps me with the cost of running Mr. Macintosh.com. Thank you

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.

macOS Catalina 10.15.8 (2026‑001) Released Six Years After Its Original Launch!

10.15.8 2026-001 Update (19H2036) Released! (note my old school update thumbnail style)

macOS Catalina 10.15.8 2026-001 Update is now Available.

Today, Apple released an update for macOS Catalina. This operating system came out more than six years ago, and many of us assumed it would never receive another update again. Surprise! We now have macOS Catalina 10.15.8 (2026‑001).

This is the link for what’s new in macOS Catalina Updates. The page entry is even marked “This article has been archived and is no longer updated by Apple”

“This update extends the certification required by features such as iMessage, FaceTime, and device activation to continue working after January 2027.”

https://support.apple.com/en-us/101184

The security page does list 10.15.8 and says the following:

“Security Update 2026-001 Catalina This update has no published CVE entries.”

https://support.apple.com/en-us/HT211947

Apple’s Public Patch Notes / Release Notes Documentation

Apple Documentation takes a little while to show up online after release. I will update when the new articles are made available.

https://support.apple.com/en-us/HT210642

developer.apple.com/documentation/macos_release_notes

developer.apple.com/documentation/macos-release-notes/macos-catalina-10_15_6-release-notes

For more detailed information about this update and previous updates, please visit: https://support.apple.com/kb/HT210642

Full List of macOS Catalina 10.15 Releases

38. 10.15.8 (19H2300) – February 2, 2026
37. 10.15.7 (19H2036) – July 20, 2022
36. 10.15.7 (19H1922) – May 16, 2022
35. 10.15.7 (19H1824) – March 14, 2022
34. 10.15.7 (19H1715) – February 14, 2022
33. 10.15.7 (19H1713) – January 26, 2022
32. 10.15.7 (19H1615) – December 13, 2021
31. 10.15.7 (19H1519) – October 25, 2021
30. 10.15.7 (19H1419) – September 23, 2021
29. 10.15.7 (19H1417) – September 13, 2021
28. 10.15.7 (19H1323) – July 21, 2021
27. 10.15.7 (19H1217) – May 24, 2021
26. 10.15.7 (19H1030) – April 26, 2021
25. 10.15.7 (19H524) – February 9, 2021
24. 10.15.7 (19H512) – February 1, 2021
23. 10.15.7 (19H114) – December 14, 2020
22. 10.15.7 (19H15) – November 5, 2020
21. 10.15.7 (19H2) – September 24, 2020
20. 10.15.6 (19G2021) – August 12, 2020
19. 10.15.6 (19G2006) – August 4, 2020
18. 10.15.6 (19G2005) – August 4, 2020
17. 10.15.6 (19G73) – July 15, 2020
16. 10.15.5 (19F2200) – June 15, 2020
15. 10.15.5 (19F2096) – June 15, 2020
14. 10.15.5 (19F101) – June 1, 2020
13. 10.15.5 (19F96) – May 26, 2020
12. 10.15.4 (19E2269) – May 6, 2020
11. 10.15.4 (19E287) – April 8, 2020
10. 10.15.4 (19E266) – March 24, 2020
9. 10.15.3 (19D2064) – March 23, 2020
8. 10.15.3 (19D76) – January 28, 2020
7. 10.15.2 (19C57) – December 10, 2019
6. 10.15.1 (19B2106) – November 13, 2019
5. 10.15.1 (19B2093) – November 13, 2019
4. 10.15.1 (19B88) – October 29, 2019
3. 10.15.0 (19A603) – October 21, 2019
2. 10.15.0 (19A602) – October 15, 2019
1. 10.15.0 (19A583) – October 7, 2019

Old List

22. 10.15.7 = (19H15) – Supplemental Update – Nov 5th 2020
21. 10.15.7 = (19H2) – Update – Sep 24th 2020
20. 10.15.6 = (19G2021) – Supplemental Update – Aug 12th 2020
19. 10.15.6 = (19G2006) – 2020 iMac Fork Re-Released – Aug 4th, 2020
18. 10.15.6 = (19G2005) – 2020 iMac Fork – Aug 4th, 2020
17. 10.15.6 = (19G73) – July 15th, 2020
16. 10.15.5 = (19F2200) – 16″ MBPro Update Fork – June 15th 2020
15. 10.15.5 = (19F2096) – 16″ MBPro Shipping Fork – June 15th 2020
14. 10.15.5 = (19F101) – Supplemental Update – June 1st, 2020
13. 10.15.5 = (19F96) – May 26, 2020
12. 10.15.4 = (19E2269) – 13″MBPro Shipping Fork – May 6th 2020
11. 10.15.4 = (19E287) – Supplemental Update – April 8th, 2020
10. 10.15.4 = (19E266) – March 24th 2020
9. 10.15.3 = (19D2064) – MBAir Shipping Fork March 23rd 2020
8. 10.15.3 = (19D76) – January 28th 2020
7. 10.15.2 = (19C57) – December 10th 2019
6. 10.15.1 = (19B2106) – 16″ MBPro Update Fork – November 13th 2019
5. 10.15.1 = (19B2093) – 16″ MBPro Shipping Fork – Nov 13th 2019
4. 10.15.1 = (19B88) – October 29th 2019
3. 10.15.0 = (19A603) – Supplemental Update Re-Released – Oct 21st 2019
2. 10.15.0 = (19A602) – Supplemental Update – October 15th 2019
1. 10.15.0 = (19A583) – October 7th 2019

macOS Catalina 10.15.8 2026-001 Update Changes, Info & Download Links

T2 BridgeOS Update

T2 BridgeOS NOT updated for 10.15.8. It will only update if you did not install the previous 2022-005 Security Update

Size = 417.7 MB

Product ID = 001-51038

BridgeOS Update Version = 17.16.16610.0.0

3. Previous 10.15.7 Update = 17.16.16610 = BuildVersion 6
2. Previous 10.15.6 Supplemental Update = 17.16.16610
1. Previous BridgeOS Update Version = 17.16.16065

Security Content of macOS Catalina 10.15.8 Update.

This document lists security updates for Apple software.

support.apple.com/en-us/HT201222

MacOS Catalina 10.15.8 2026-001

The following security fixes are included in Catalina 10.15.8.

Released Feb 2, 2026

“Security Update 2026-001 Catalina This update has no published CVE entries.”

macOS Big Sur 11.7.11 Update Released Years After Retirement

macOS Big Sur 11.7.11 Update is now available!

Well this is a new one… Apple just released macOS Big Sur 11.7.11 (20G1443) Update!

Apple ended support for macOS Big Sur in September 2023. With this release, Big Sur now ties OS X Tiger (10.4.11) for the most point‑release updates in macOS history. Who would have thought we’d see another update for Big Sur? We did get a hint last week when Apple pushed out several older iOS updates, but I still didn’t expect any new macOS releases. I’m glad I was wrong.

This will allow important services like device activation, FaceTime, iMessage and other services to continue to work after the current certificates expires in January 2027.

I applaud Apple for doing this. We need to recognize that for many people, older computers are their only means of communication. Not everyone has the resources to buy a new device. This update will help those users continue using their Macs and iPhones. It’s especially important to remember how impactful this is in impoverished areas around the world.

Even though Apple updated Big Sur to address these certificate issues, it’s important to remember that the OS is no longer security‑supported. No security updates have been released for it in over two years. If possible, please use OCLP or upgrade to at least the last supported version, macOS Sonoma.

Big Sur Update Quick Overview

macOS Big Sur 11.7.11 Update – This update extends the certification required by features such as iMessage, FaceTime, and device activation to continue working after January 2027.
Big Sur 11.7.11 Full installer is available!
Apple stopped releasing M1 IPSW restore files after version 11.6.
Safari update = 16.6.1 is the latest version available

macOS Big Sur Update Summary

New Features – None
Resolved Issues – Multiple certificates were updated
Security Fixes – None

macOS Background Security Improvement Update (BSI) Database

macOS Tahoe Background Security Improvement Updates (BSI)

Apple has just released the very first macOS Tahoe Background Security Improvement Update: macOS Tahoe 26.3.1 (a) 25D771280a)

UPDATED: 3/19/26

If this sounds familiar, you are right! Starting in macOS Ventura, Apple added a new security feature called “Rapid Security Response” or RSR for short. This new update system was designed so that Apple can quickly deploy a small targeted security update. Users would no longer have to wait for a large OS updates to be fully protected from security vulnerabilities.

Database of all Tahoe BSI Updates

This database will contain changes in the OS Tahoe version number. It will also contain changes in the Safari version number. These changes will occur if there is any, when a BSI update is made available.

NOTE: I’ve included a direct Apple download link for each BSI. The update can’t be installed manually, but you can inspect it. The BSI manual download file format is .aea

macOS Tahoe BSI Updates

Tahoe BSI Build Version	Required Version	Platform	Date
Tahoe 26.3.1 (a) (25D771280a)	26.3.1	M1+	3/17
Tahoe 26.3.2 (a) (25D771400a)	26.3.2	NEO ONLY	3/17
Tahoe 26.3.1 (a) (25D771280a)	26.3.1	Intel	3/17
Tahoe 26.3 (b) (25D770870v) B2	26.3 (b)	M1+	1/8/26
26.3 (b) Requires (a) to show
Tahoe 26.3 (b) (25D770870v) B2	26.3 (b)	Intel	1/8/26
26.3 (b) Requires (a) to show
Tahoe 26.3 (a) (25D770870b) B1	26.3 (a)	M1+	1/6/25
Tahoe 26.3 (a) (25D770870b) B1	26.3 (a)	Intel	1/6/26
Tahoe 26.2	No BSI

macOS Tahoe BSI Safari Updates

Ventura RSR Version	Safari Version	Date
Safari 26.3 Beta	None	No RSR
Safari 26.2	None	No RSR

NOTE: BSI and macOS Updates are cumulative.

Example: Tahoe 26.3 (a) <– Tahoe 26.3 (b) <– Tahoe 26.4

Each new version of macOS includes the earlier fixes.

Thanks

Thank you goes out to the fine people The AppleWiki for providing BSI download links. Also HT to @dhinak & Nicolas for always being the ones to share new updates! https://theapplewiki.com/wiki/Beta_Background_Security_Improvements/Mac/26.x

macOS Tahoe 26.2 Update! Everything you need to know.

macOS Tahoe 26.2 (25C56) is now Available For All Users!

UPDATED: 12/15/25

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

Apple just released the 3rd update for macOS Tahoe to the public! Let’s jump in and find out what’s new.

macOS Tahoe 26.2 Update Summary:

NOTE: The Beta RC release of 26.2 is the same as the Public release.

Edge Light video effect uses the Mac display to illuminate your face like a virtual ring light when you’re on a video call in low light
Podcasts – Automatically generated chapters make it easier to navigate more episodes
Games – Filters in the Games library let you find games by category, size, and more

The following Apple Support documents have been released:

What’s new in macOS Tahoe – https://support.apple.com/en-us/122868
New features in macOS Tahoe PDF – https://www.apple.com/os/pdf/All_New_Features_macOS_Tahoe_Sept_2025.pdf
Mac App Store macOS Tahoe Link – NOT COMING. Apple has decided not to list macOS Tahoe in the Mac App Store.
What’s new in macOS Tahoe for Enterprise – https://support.apple.com/en-us/124963

OpenCore Legacy Patcher for Unsupported Macs

OCLP 2.4.1 & macOS Tahoe 26.2 : 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 = in progresss

Kernel Debug Kit (KDK) Status: = Kernel Debug Kit 15.6 build 24G84 https://github.com/dortania/KdkSupportPkg/releases

Metallibsupport Status: = MetallibSupportPkg-15.6.1-24G90 https://github.com/dortania/MetallibSupportPkg/releases

macOS Tahoe Beta Patch Notes Summary

1. New Features/Improvements – 3
2. Bug Fixes – 5
3. Security Fixes – 48 CVE’s addressed
4. Enterprise Changes – 3
5. Safari Security (Webkit) –
6. Full installer & IPSW – Both are now available!
7. Safari – 26.2 Updated in Tahoe
7. OpenCore Legacy Patcher Users – NOT COMPATIBLE!

Full Apple Update Release list

macOS 💻 ✅

Tahoe 26.2 (25C56)
Sequoia 15.7.3 (24G419)
Sonoma 14.8.3 (23J220)
Safari – 26.2
Xcode – Xcode 26.2
Command Line Tools for Xcode – Xcode 26.2 Command Line Tools

Other 📲📺⌚️✅

iOS & iPadOS 26.2 (23C55)
iOS & iPadOS 18.7.3 (22H217)
homePodOS 26.2 (23K54)
watchOS 26.2 (23S303)
tvOS 26.2 (23K54)
visionOS 26.2 (23N301)

NOTE: I hate website ads, but this one small google ad below helps me with the cost of running Mr. Macintosh.com. Thank you

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

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

macOS Tahoe 26.5.1 (25F80) is now Available For All Users!

macOS Tahoe Patch Notes Summary

OpenCore Legacy Patcher for Unsupported Macs

Full Apple Update Release list

Security Vulnerabilities Patched

Table of Contents

macOS Tahoe 26.5 (25F71) is now Available For All Users!

macOS Tahoe Patch Notes Summary

OpenCore Legacy Patcher for Unsupported Macs

Full Apple Update Release list

Security Vulnerabilities Patched

Table of Contents

macOS Tahoe 26.4.1 (25E253) is now Available For All Users!

macOS Tahoe Patch Notes Summary

OpenCore Legacy Patcher for Unsupported Macs

Full Apple Update Release list

Table of Contents

macOS Tahoe 26.4 (25E246) is now Available For All Users!

macOS Tahoe Patch Notes Summary

OpenCore Legacy Patcher for Unsupported Macs

Full Apple Update Release list

Table of Contents

macOS Tahoe 26.3.1 (25D2128) is now Available For All Users!

New MacBook Neo Wallpaper!

macOS Tahoe Patch Notes Summary

OpenCore Legacy Patcher for Unsupported Macs

Full Apple Update Release list

Table of Contents

macOS Tahoe 26.3 (25D125) is now Available For All Users!

macOS Tahoe Patch Notes Summary

OpenCore Legacy Patcher for Unsupported Macs

Full Apple Update Release list

Table of Contents

macOS Catalina 10.15.8 2026-001 Update is now Available.

Apple’s Public Patch Notes / Release Notes Documentation

Full List of macOS Catalina 10.15 Releases

Old List

macOS Catalina 10.15.8 2026-001 Update Changes, Info & Download Links

T2 BridgeOS Update

Security Content of macOS Catalina 10.15.8 Update.

macOS Big Sur 11.7.11 Update is now available!

Big Sur Update Quick Overview

macOS Big Sur Update Summary

macOS Tahoe Background Security Improvement Updates (BSI)

UPDATED: 3/19/26

Database of all Tahoe BSI Updates

macOS Tahoe BSI Updates

macOS Tahoe BSI Safari Updates

NOTE: BSI and macOS Updates are cumulative.

Thanks

macOS Tahoe 26.2 (25C56) is now Available For All Users!

OpenCore Legacy Patcher for Unsupported Macs

macOS Tahoe Beta Patch Notes Summary

Full Apple Update Release list

Table of Contents