Uploaded February 2025 | Updated September 2026, 2 weeks ago

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Apple just released the 3rd minor update to macOS Sequoia, 15.3.1! In this video, I'll go over all the details that you will need to know about this update, including all the new features & fixes. I'll also preview OpenCore Legacy Patcher 2.2.0. Plus I will cover both Apple Silicon and Intel! CHAPTERS BELOW!

0:00 macOS Sequoia 15.3.1 Welcome and intro
0:24 Full Apple Software Update release list iOS, iPadOS & visionOS
0:49 Using System Settings to download & install the Sequoia 15.3.1 update
1:38 Update Complete! What is the new BuildVersion of the 15.3.1 Update?
1:48 How long did the macOS Sequoia 15.3.1 update take to Install?
2:25 macOS Sequoia Update sizes for Apple Silicon, Intel & Unsupported Macs
2:47 Apple Silicon & Intel BridgeOS Firmware Updates
3:18 Was Safari Web Browser updated? Sonoma & Ventura Standalone update?
3:51 What’s new in the macOS Sequoia 15.3.1 Update?
4:15 What’s new in Security Fixes in the Sequoia 15.3.1 Update?
5:22 Important iOS 18.3.1 Security Update
5:58 A closer look with Howard Oakley
7:17 What’s new for enterprise in macOS Sequoia
7:38 macOS Sequoia 15.3.1 Update Geekbench 6 Benchmarks
8:35 OpenCore Legacy Patcher 2.2.0 & 15.3.1 Quick Look Preview
15:40 Any Questions or Comments? THANK YOU!!!!

The macOS Sequoia 15.3 Update was released on 2/10/25 @ 12:07 PM CDT

My macOS Sequoia 15.3.1 Update Article
mrmacintosh.com/macos-sequoia-15-3-1-update-everything-you-need-to-know

What's new in macOS Sequoia Updates Page
support.apple.com/en-us/120283

Apple Security Updates Page
support.apple.com/en-us/100100

What's new for enterprise in macOS Sequoia
support.apple.com/en-gb/121011

Support Mr. Macintosh
patreon.com/mrmacintosh
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My Install macOS Sequoia on Unsupported Macs Video - youtu.be/rfa2aSm7OxQ

Download Full macOS Sequoia Installers InstallAssistant.pkg
mrmacintosh.com/macos-sonoma-full-installer-database-download-directly-from-apple

Download Full macOS Sequoia, Sonoma, Ventura, Monterey & Big Sur M1, M2, M3 & M4 Apple Silicon IPSW Files
mrmacintosh.com/apple-silicon-m1-full-macos-restore-ipsw-firmware-files-database

Links
MrMacintosh.com - Apple Mac Enterprise IT Blog & macOS News for MacAdmins

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twitter.com/ClassicII_MrMac

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