"macOS Monterey 12.3.1 includes bug fixes and security updates for your Mac.
This update fixes the following issues:

- Some 2021 MacBook Pro models cannot update or restore to macOS Monterey 12.3.

- USB-C or Thunderbolt external display does not turn on when connected to Mac mini (2018) as a second display.

- Bluetooth devices, such as game controllers, may disconnect from your Mac after playing audio through some Beats headphones.

(VPN or 3rd party Security software may cause problems with OS or security updates.
Apple's article on VPN and 3rd party software issues & the usual advice on updates.
Even though I don't use 3rd party addons, I install macOS updates from a Safe Mode boot.)

• About the security content of iOS 15.4.1 and iPadOS 15.4.1
  - Fix for AppleAVD (CVE-2022-22675) that has reportedly been actively exploited.
  
  
• See About iOS 15.4.1 Update (bug fixes and security updates)
  - Apple's iPhone discussion forum.
  
  
• See About iPadOS 15.4.1 Update (bug fixes and security updates)
  - Apple's iPad discussion forum.
  
  
• See About watchOS 8.5.1 Update
  "Includes security updates and bug fixes for your Apple Watch."
  - Apple's security updates page says "This update has no published CVE entries".
  - Apple's Watch discussion forum.
  
  
• About tvOS Updates for 15.4.1 says:
  - "Includes stability improvements when setting up or restoring your Apple TV."
  - Apple's security updates page says "This update has no published CVE entries".
  - Apple's Apple TV discussion forum.

"Software version 15.4.1 addresses an issue where some HomeKit-enabled accessories could fail to respond when controlled via Siri. This update also includes bug fixes for your HomePod."

• iOS Chrome browser version 100.0.4896.77 for iOS/iPadOS 14.0 or later
  - App store lists "Stability and performance improvements" again.
  
  
• Apple Business Essentials now available for small businesses (pr)
  
  
• Update on "reader" app distribution (Apple developer news)
  
  
• Apple TV+ "Friday Night Baseball" doubleheader schedule beginning April 8 (pr)
  
  
• Apple's "CODA" wins historic Oscar for Best Picture at the Academy Awards (pr)

• If your External Display isn't detected or appears blurry on your Mac
  (Lots of reports on external display problems after the Monterey 12.3 update.)
  
  
• About iCloud Private Relay
  
  
• Use the Files app on your iPhone, iPad, and iPod touch
  
  
• If your Apple devices aren't getting Apple push notifications
  
  
• How to set up and use HomePod mini and HomePod
  
  
• Find out which macOS your Mac is using
  - Added macOS Monterey 12.3.1.

March 21st to 25th, 2022 News Archive
• Safari Technology Preview 142.
• Carbon Copy Cloner version 6.1.1 Release Notes.
• What's new in Apple Configurator 2.15.1.
• VLC Media Player 3.3.0 for iOS/iPadOS/tvOS.
• Apple Studio Display Firmware Update 15.4.
• Pixelmator Pro version 2.3.8 (macOS 10.15 or later).
• What to do before you sell, give away, or trade in your Mac.
• VirtualBox 6.1.34 includes 2 macOS related fixes.
• GIMMICK Malware Strikes at macOS.
• Apple announces new coaching program and features for educators.
• Apple's Mac Studio Essentials (user guide).
• Apple's Mac Studio discussion forum.
• FYI on new Mac Setup without a USB keyboard.
• Firefox 98.0.2 (bug fixes).
• Firefox 98.2 for iOS/iPadOS 13 or later.
• Chrome 99.0.4844.84 Stable Channel Update for Desktop.
• Chrome 98.0.4758.141 Extended Stable Channel Update for Desktop.
• Apple Support/How-To/Troubleshooting Article Updates.

For links to older news pages, see the Archives.