macOS Sequoia 15.3 Update Everything You Need to Know!

macOS Sequoia 15.3 Update is now Available!

UPDATED: 1/30/25

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

Apple just dropped the 3rd Major release for Sequoia, macOS Sequoia 15.3 Update! Let’s jump in and find out what’s new.

This update adds Genmoji creation in Messages and other apps plus introduces changes around how Apple Intelligence is enabled. Staring in Sequoia 15.3, Apple Intelligence is enabled by default in the setup assistant. Take a closer look at the macOS Sequoia Enterprise notes for more details.

OpenCore Legacy Patcher for Unsupported Macs

OCLP 2.2.0 & macOS Sequoia 15.3 Update: = Testing so far – Mac Pro 2013, MacBook 12″ 2016 and 2011 17″ MacBook Pro Non-Metal tested good.

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

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

macOS Sequoia Patch Notes Summary

  • 1. New Features/Improvements – 3
  • 2. Operating Sytem Bug Fixes – 1
  • 3. Security Fixes – 51
  • 4. Enterprise Changes – 5
  • 5. Safari Security (Webkit) – 6
  • 6. Full installer & Apple Silicon IPSW – Full installer InstallerAssistant.pkg & IPSW Apple Silicon Restore Files released!

Full Apple Update Release list

  1. Sequoia 15.3 (24D60)
  2. Sonoma 14.7.3 (23H417)
  3. Ventura 13.7.3 (22H417)
  4. iOS & iPadOS 18.3 (22D63)
  5. iPadOS 17.7.4 (21H414)
  6. audioOS 18.3 (22K557)
  7. tvOS 18.3 (22K557)
  8. watchOS 11.3 (22S555)
  9. visionOS 2.3 (22N896)

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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

  • 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 = 15.22GB was 14.53GB

Apple Silicon Updates

Delta from macOS 15.2 with size = 2.54GB

Intel Updates

Delta from macOS 15.2 with size = 1.39GB

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!

  • 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!

  • 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!

  • 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!

  • 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!

  • 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 15.3

Enterprise changes in macOS Sequoia

  • 1. Apple Intelligence is turned on automatically after updating to macOS 15.3 or during device setup unless MDM skips the Apple Intelligence setup pane.
  • 2. MDM can require sign-in from a specified Workspace ID for requests to external intelligence integrations such as ChatGPT.
  • 3. MDM can disable transcription summarization in Notes.
  • 4. AirPlay connects successfully when using the built-in firewall and a content filter extension.
  • 5. Improves stability for apps over VPN connections when using the built-in firewall and a content filter extension.

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

12. Security Content of macOS 15.3

Security vulnerabilities in this Update

Fixes addressed in this update = 51

Safari & Webkit = 6

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

13. macOS Sequoia 15.3 Update Release Notes

This update introduces Genmoji, powered by Apple Intelligence, and also includes other enhancements, bug fixes, and security updates for your Mac.

1. Genmoji creation in Messages and other apps

2. Calculator repeats the last mathematical operation when you click the equals sign again

3. Easily manage settings for notification summaries from the Lock Screen (Mac with Apple silicon)

4. Updated style for summarized notifications better distinguishes them from other notifications by using italicized text as well as the glyph (Mac with Apple silicon)

5. Notification summaries for News & Entertainment apps are temporarily unavailable, and users who opt-in will see them again when the feature becomes available (Mac with Apple silicon)

Some features may not be available for all regions, or on all Apple devices.
For detailed information about the security content of this update, please visit: https://support.apple.com/100100

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