macOS Sequoia 15.4 Update Everything You Need to Know!

macOS Sequoia 15.4 Update is now Available!

UPDATED: 4/10/25

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

Apple just dropped the 4th major release for Sequoia, macOS Sequoia 15.4 Update! Let’s jump in and find out what’s new.

This update is considered the “Spring Release” because it is the last big update for macOS Sequoia. All focus from Apple will now be on the development of macOS 16. Without a doubt, this is a HUGE update and will take some time to go through! Stay tuned!

IMPORTANT NOTE: The 15.4 update will automatically enable “Download And Install OS Updates”! Be sure to disable this if you don’t want OS updates to automatically download and install. Turning off Auto Updates is REQUIRED for OCLP users!

1. UPDATE: OpenCore Legacy Patcher 2.3.0 was just released and it includes Sequoia 15.4 compatibility!

2. UPDATE 2: OCLP 2.3.1 was released to fix an issue with OCLP Vaulting that affected a few models.

3. UPDATE 3: OCLP 2.3.2 Hotfix released to fix T1 password crashing issue.

Apple just broke 2 records with the Sequoia 15.4 Update!

  • Security Fixes = 131 CVE’s patched
  • Enterprise Fixes = 17 detailed improvements!

OpenCore Legacy Patcher for Unsupported Macs

OCLP 2.3.2 & macOS Sequoia 15.4 Update: = 2013 Mac Pro, 2012 13″ MacBook Pro, 2011 17″ MacBook Pro, 2008 15″ MacBook Pro, 2014 11″ MacBook Air, 2012 Mac mini, 2010 Mac Pro, 2013 15″ MacBook Pro, 2011 27″ iMac & 2015 27″ iMac

Kernel Debug Kit (KDK) Status: = Kernel_Debug_Kit_15.4_build_24E247.dmg
https://github.com/dortania/KdkSupportPkg/releases

MetallibSupportPkg Status: = MetallibSupportPkg-15.4-24E248.pkg
https://github.com/dortania/MetallibSupportPkg/releases

macOS Sequoia Patch Notes Summary

  • 1. New Features/Improvements – 10
  • 2. Operating System Bug Fixes – 9
  • 3. Security Fixes – 131
  • 4. Enterprise Changes – 17!!!
  • 5. Safari Security (Webkit) –
  • 6. Full installer & Apple Silicon IPSW – Full installer InstallerAssistant.pkg & IPSW Apple Silicon Restore Files released!

Full Apple Update Release list

  1. Sequoia 15.4 (24E248)
  2. Sonoma 14.7.5 (23H527)
  3. Ventura 13.7.5 (22H527)
  4. iOS 18.4 (22E240)
  5. iOS 17.7.6 (21H423)
  6. iOS 16.7.11 (20H360)
  7. iOS 15.8.4 (19H390)
  8. audioOS 18.4 (22L255)
  9. tvOS 18.4 (22L255)
  10. visionOS 2.4 (22O238)
  11. watchOS – Waiting

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Table of Contents

  • 1. macOS Sequoia Apple Links
  • 2. macOS Sequoia Final Release History
  • 3. macOS Sequoia Full Installer.app
  • 4. Apple Silicon macOS Sequoia IPSW Restore file Database
  • 5. macOS Sequoia 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 Sequoia
  • 12. Security Content of macOS Sequoia
  • 13. macOS Sequoia Release Notes / Patch Notes / Changes

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

1. Apple macOS Links

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

  1. What’s new in the updates for macOS Sequoia – https://support.apple.com/en-us/120283
  2. What’s new for enterprise in macOS Sequoia – https://support.apple.com/en-us/121011
  3. Apple Security Updates Page – https://support.apple.com/en-us/HT201222
  4. macOS Sequoia features page – https://www.apple.com/macos/macos-sequoia/
  5. Platform Security Guide – macOS Rapid Security Response system.
  6. Platform Guide Deployment – What’s new in Apple platform deployment
  7. AppleSeed Notes Link = appleseed.apple.com/
  8. Apple Developer Public Link = developer.apple.com/documentation/macos-release-notes
  9. macOS Deployment References Changes – https://support.apple.com/guide/deployment-reference-macos/document-revision-history-apd04dff7069/web

2. macOS Sequoia 15 Final Release History

  • 9. macOS Sequoia 15.4 (24E248) – 3/31/25
  • 8. macOS Sequoia 15.3.2 (24D81) – 3/11/25
  • 7. macOS Sequoia 15.3.1 (24D70) – 2/10/25
  • 6. macOS Sequoia 15.3 (24D60) – 1/27/25
  • 5. macOS Sequoia 15.2 (24C101) – 12/11/24
  • 4. macOS Sequoia 15.1.1 (24B91) – 11/19/24
  • 3. macOS Sequoia 15.1 (24B83) – 10/28/24
  • 2. macOS Sequoia 15.0.1 (24A348) – 10/04/24
  • 1. macOS Sequoia 15.0 (24A335) – 9/16/24

3. macOS Sequoia 15 Full Installer.app

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

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

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

4. Apple Silicon macOS Sequoia IPSW Restore file Database

Apple has released the full IPSW restore file of macOS for Apple Silicon M1,M2 & M3 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 Sequoia Update sizes

Sequoia Delta Update

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

Full update & Sequoia OCLP Users = 15.58GB

Apple Silicon Updates

Delta from macOS Sequoia 15.3.2 with size = 6.17GB

Intel Updates

Delta from macOS Sequoia 15.3.2 with size = 3.34GB

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“

Apple Silicon Firmware = UPDATED!

  • 9. macOS Sequoia 15.4 = 11881.101.1
  • 8. macOS Sequoia 15.3.2 = 11881.81.4
  • 7. macOS Sequoia 15.3.1 = 11881.81.4
  • 6. macOS Sequoia 15.3 = 11881.81.2
  • 5. macOS Sequoia 15.2 = 11881.61.3
  • 4. macOS Sequoia 15.1.1 = 11881.41.5
  • 3. macOS Sequoia 15.1 = 11881.41.5
  • 2. macOS Sequoia 15.0.1 = 11881.1.1
  • 1. macOS Sequoia 15.0 = 11881.1.1

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 = UPDATED!

  • 9. macOS Sequoia 15.4 = 11881.101.1
  • 8. macOS Sequoia 15.2.2 = 11881.81.4
  • 7. macOS Sequoia 15.3.1 = 11881.81.4
  • 6. macOS Sequoia 15.3 = 11881.81.2
  • 5. macOS Sequoia 15.2 = 11881.61.3
  • 4. macOS Sequoia 15.1.1 = 11881.41.5
  • 3. macOS Sequoia 15.1 = 11881.41.5
  • 2. macOS Sequoia 15.0.1 = 11881.1.1
  • 1. macOS Sequoia 15.0 = 11881.1.1

8. Intel T2 BridgeOS Update

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

BridgeOS version = UPDATED!

  • 9. macOS Sequoia 15.4 = 22.16.14248.0.0
  • 8. macOS Sequoia 15.3.2 = 22.16.13060.0.0
  • 7. macOS Sequoia 15.3.1 = 22.16.13051.0.0
  • 6. macOS Sequoia 15.3 = 22.16.13051.0.0
  • 5. macOS Sequoia 15.2 = 22.16.12093.0.0
  • 4. macOS Sequoia 15.1.1 = 22.16.11072.0.0
  • 3. macOS Sequoia 15.1 = 22.16.11072.0.0
  • 2. macOS Sequoia 15.0.1 = 22.16.11053.5.1,0
  • 1. macOS Sequoia 15.0 = 22.16.11053.5.1,0

9. Intel T2 Firmware Update

The version of firmware for your Mac (2018-2020 Intel Macs) was updated.

Firmware version = UPDATED!

  • 9. macOS Sequoia 15.4 = 2075.101.2.0.0
  • 8. macOS Sequoia 15.3.2 = 2069.80.3.0.0
  • 7. macOS Sequoia 15.3.1 = 2069.80.3.0.0
  • 6. macOS Sequoia 15.3 = 2069.80.3.0.0
  • 5. macOS Sequoia 15.2 = 2069.40.2.0.0
  • 4. macOS Sequoia 15.1.1 = 2069.40.2.0.0
  • 3. macOS Sequoia 15.1 = 2069.40.2.0.0
  • 2. macOS Sequoia 15.0.1 = 2069.40.2.0.0
  • 1. macOS Sequoia 15.0 = 2069.40.2.0.0

10. Safari Update

The new version of Safari 18 is included in the macOS 15 update.

Safari = UPDATED!

  • 9. macOS Sequoia 15.4 = Safari 18.4 (20621.1.15.11.10)
  • 8. macOS Sequoia 15.3.2 = Safari 18.3.1 (20620.2.4.11.6)
  • 7. macOS Sequoia 15.3.1 = Safari 18.3 (20620.2.4.11.5)
  • 6. macOS Sequoia 15.3 = Safari 18.3 (20620.2.4.11.5)
  • 5. macOS Sequoia 15.2 = Safari 18.2 (20620.1.16.11.8)
  • 4. macOS Sequoia 15.1.1 = Safari 18.1.1 (20619.2.8.11.12)
  • 3. macOS Sequoia 15.1 = Safari 18.1 (20619.2.8.11.10)
  • 2. macOS Sequoia 15.0.1 = Safari 18.0.1 (20619.1.26.31.7)
  • 1. macOS Sequoia 15.0 = Safari 18.0 (20619.1.26.31.6)

11. What’s new for Enterprise in macOS 15.4

Enterprise changes in macOS Sequoia

  • Setup Assistant allows authentication with passkeys and supported hardware security keys during MDM enrollment.
  • MDM can now configure enrollment into macOS beta programs.
  • The “Transfer Your Data to This Mac” pane cannot be skipped by MDM during Setup Assistant. The “Restore” skip key still prevents transferring data from another computer or a backup during Setup Assistant.
  • A new Setup Assistant pane is displayed to enable automatic software updates. This pane is skipped when automatic updates are configured by MDM or when the “SoftwareUpdate” skip key is used.
  • When Private Wi-Fi Address is disabled by MDM for a managed Wi-Fi network, it cannot be manually enabled for that network by the user.
  • MDM can disable smart replies in Mail, the ability to summarize content in Safari, and Apple Intelligence reports.
  • When using TLS_ECDHE_RSA or TLS_DHE_RSA cipher suites, 802.1X server certificates containing a Key Usage extension must have Digital Signature key usage set.
More…
  • When using the TLS_RSA cipher suite, 802.1X server certificates containing a Key Usage extension must have Key Encipherment key usage set.
  • Resolved an intermittent issue where the Login Window failed to accept a correct password.
  • Content filter extensions correctly receive non-TCP/UDP network protocol traffic.
  • Resolved an issue where Software Update offered a full installer requiring administrator authorization to install instead of a smaller incremental update.
  • Resolved an issue where the Reactions tip would appear more than intended in video conferencing apps and would fail to dismiss.
  • Resolved an issue that could cause a MacBook to boot to Recovery after a managed software update while not connected to power.
  • Resolved an issue where managed software updates incorrectly prompt for a user password when a bootstrap token is present.
  • Improves reliability for 802.1X authentication over Ethernet after a reboot when FileVault is enabled.
  • Kerberos tickets are successfully requested when iCloud Private Relay is enabled.
  • Finder no longer fails to copy some dataless files from SMB file shares.

https://support.apple.com/en-us/121011

12. Security Content of macOS 15.4

Security vulnerabilities in this Update

Fixes addressed in this update = 131 (This is an all time record!!!)

Safari & Webkit = waiting

Available for: macOS Ventura and macOS Sonoma

https://support.apple.com/en-us/122373

13. macOS Sequoia 15.4 Update Release Notes

This update introduces the ability to create Memory movies in Photos with Apple Intelligence, a new Sketch Style option in Image Playground, Mail Categorization, and enhancements to better organize and filter your library in Photos. This release also includes other features, bug fixes, and security updates for your Mac.

Apple Intelligence (Mac with M1 and later)

1. Memory movies can be created by describing the story you want to see in Photos

2. Sketch is now available as a style option in Image Playground, so you can create gorgeous drawings

3. Apple Intelligence features support 8 additional languages and 2 additional English locales, including English (India, Singapore), French (France, Canada), German (Germany), Italian (Italy), Japanese (Japan), Korean (South Korea), Portuguese (Brazil), Simplified Chinese, and Spanish (Spain, Latin America, US) 

Mail

• Mail Categorization sorts your messages to help you prioritize the most important messages

Photos

1. New filter to show or hide items not contained in an album in the Library view

2. Retouch brush is included in the Clean Up tool

3. Reorder items in the Media Types and Utilities collections

4. Consistent filtering options in all collections, including the ability to sort by oldest or newest first

5. Option to sort albums by Date Modified

6. Disable “Recently Viewed” and “Recently Shared” collections from the View menu

This update also includes the following enhancements and bug fixes:

1. 8 new emoji including objects, plants, and a smiley face are now available in the emoji keyboard

2. New widgets for Podcasts including a Followed Shows widget to track your favorite shows and a Library widget to get to your most used sections, such as Latest Episodes, Saved, and Downloaded

3. Matter-compatible robot vacuum cleaners can be controlled in the Home app as well as be added to scenes and automations

4. Resolves an issue where certain external displays might not be able to turn off Night Shift

5. Increases the default maximum memory allocation limit available to the GPU on Mac Studio (2025) with M3 Ultra with 256GB or 512GB of unified memory

6. Improves transcoding performance in Final Cut Pro on Mac Studio (2025) with M3 Ultra

7. Screen Time App Limits persist even after a child uninstalls and reinstalls an app

8. Fixes an issue where VoiceOver navigates elements in incorrect order in Music

9. Addresses an issue where a Braille display may show an incorrect line when navigating lines with left or right arrows

This release also includes other features, bug fixes, and security updates for your Mac.

For information on the security content of Apple software updates, please visit this website: https://support.apple.com/100100

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