macOS Golden Gate Beta 1 – Everything You Need to Know!

macOS Golden Gate 27.0 (26A5353q) Beta 1 is now Available!

UPDATED: 6/08/26

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

Apple just released the first beta of macOS Golden Gate Beta 1 update to developers! Let’s jump in and find out what’s new.

OpenCore Legacy Patcher for Unsupported Macs

OCLP 2.4.0 & macOS Golden Gate 27 & Tahoe 26 : DO NOT INSTALL NOT COMPATIBLE YET. This release is in full testing and it is not recommended that you attempt to install it yet.!

Kernel Debug Kit (KDK) Status:

Metallibsupport.pkg Status:

macOS Golden Beta 1 Patch Notes Summary

  • 1. New Features/Improvements
  • 2. Security Fixes
  • 3. Enterprise Changes
  • 4. Safari Security (Webkit)
  • 5. Full installer & IPSW 
  • 6. Safari
  • 7. OpenCore Legacy Patcher Users 

Full Apple Update Release list

macOS 💻 ✅

  • Golden Gate Beta 1 (26A5353q)
  • Tahoe – 26.6 Beta 1
  • Sequoia – 15.7.8 Beta 1
  • Sonoma – No longer supported.
  • Safari – 27.0
  • Xcode – Xcode 27 beta
  • Command Line Tools for Xcode – Xcode 27 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

Table of Contents

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

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

1. Apple macOS Golden Gate Links

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

  1. What’s new in the updates for macOS Golden Gate – Waiting
  2. What’s new for enterprise in macOS Golden Gate – Waiting
  3. Apple Security Updates Page – https://support.apple.com/en-us/HT201222
  4. macOS Golden Gate Mac App Store link – Apple no longer has macOS Download links starting with macOS Tahoe
  5. macOS Golden Gate features page – https://www.apple.com/macos/os/
  6. Platform Security Guide – New macOS Rapid Security Response system.
  7. 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

3. macOS Golden Gate Final & Beta Release History

  • 1. macOS Tahoe 27 Beta 1 (26A5353q) – 6/08/26

4. macOS Golden Gate Full Installer.app

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

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

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

5. 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/

6. macOS Golden Gate Beta 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 26.5.1 with size =

Intel Updates

Delta from macOS Sequoia 15.5 with size = 4.23GB

7. 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!

  • 1. macOS Golden Gate Beta 1 =

8. 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 =

  • 1. macOS Golden Gate Beta 1 =

9. Safari Update

The new version of Safari 27 is included in the macOS 27 Golden Gate update.

Safari = Updated!

  • 1. macOS Golden Gate Beta 1 = Safari 27.0

10. What’s new for Enterprise in macOS 27

Enterprise changes in macOS Golden Gate beta

  • ?

https://support.apple.com/en-us/HT213893

11. Security Content of macOS Golden Gate Beta

NOTE: Apple does not disclose security information on macOS Beta versions.

Security vulnerabilities in this Update

Fixes addressed in this update =

Safari 27.0 =

Webkit =

12. macOS Golden Gate Beta Release Notes

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

Liked it? Take a second to support Mr. Macintosh on Patreon!
Become a patron at Patreon!
Mastodon