Uploaded December 2021 | Updated September 2026, 2 weeks ago

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MacOS Monterey 12.1 Update is LIVE! I will go over everything you need to know about this update. Including, New Features, update sizes and details, OS Fixes, Security Updates, Memory Leaks, Universal Control Delayed and OpenCore Legacy Patcher News + new 0.3.2 Update!! CHAPTERS BELOW.

UPDATE 12/15 - I'm hearing that some OCLP users are having a few problems with the 12.1 update. You might want to hold off a for a little bit. I'm looking into the changes in the OCLP 0.3.3 update now.

Chapters
0:00 Monterey 12.1 Update Intro
0:41 Monterey 12.1 Full Installer & M1 IPSW Restore File
0:58 Delta Update, T2 BridgeOS, M1 Firmware & Safari 15.2
1:30 Monterey 12.1 Security Fixes
1:46 Monterey 12.1 Big Fixes
3:05 Undocumented Fixes
3:41 Monterey 12.0.1 Memory leaks
4:29 Universal Control Delayed until Spring 2022!!!
5:09 Monterey 12.1 New Features
7:56 What’s new in Enterprise/Business 5:01
9:14 OCLP Unsupported Mac News
12:41 Thank you! Comments? Questions?

The macOS Monterey 12.1 Update was released on December 13th, 2021.

macOS Monterey 12.1 Update Article
mrmacintosh.com/macos-monterey-12-1-21c52-is-live-whats-new

MacBook Pro M1 Pro
MacBook Pro M1 Max

macOS Monterey RC2 What's New Full Article
mrmacintosh.com/macos-monterey-12-0-1-rc2-21a559-is-live-whats-new

macOS Monterey 12.1 Security Updates

macOS Monterey Apple Patch notes public link = developer.apple.com/documentation/macos-release-notes

About the security content of macOS Monterey 12.1
support.apple.com/en-us/HT212978

What's new for enterprise in macOS Monterey
support.apple.com/en-us/HT212586

Download Full macOS Monterey & Big Sur Installers InstallAssistant.pkg - mrmacintosh.com/macos-12-monterey-full-installer-database-download-directly-from-apple

Download Full macOS Monterey & Big Sur M1 Apple Silicon IPSW Files
mrmacintosh.com/apple-silicon-m1-full-macos-restore-ipsw-firmware-files-database

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Mac Transition to Apple Silicon Everything you need to know!
mrmacintosh.com/mac-transition-to-apple-silicon-everything-you-need-to-know-updated

New Article How to reinstall macOS on your Apple Silicon Mac
mrmacintosh.com/how-to-reinstall-macos-on-your-apple-silicon-mac-everything-you-need-to-know

macOS ISPW Firmware Database - Download Full macOS ISPW Files!
mrmacintosh.com/apple-silicon-m1-full-macos-restore-ipsw-firmware-files-database

Download macOS Big Sur Full Installers via InstallAssistant.pkg
mrmacintosh.com/macos-big-sur-full-installer-database-download-directly-from-apple

macOS Updates Database! – OS, Xprotect & App Version Database
mrmacintosh.com/macos-system-status-version-info-for-macadmins

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