"The macOS Catalina 10.15.3 update improves the stability, reliability, and security of your Mac, and is recommended for all users.

This update:
- Optimizes gamma handling of low gray levels on Pro Display XDR for SDR workflows when using macOS.
- Improves multi-stream video editing performance for HEVC and H.264 encoded 4K video on the 16-inch MacBook Pro (2019)."

(FYI: the owner that reported poor 2019 Mac Pro Final Cut Pro X performance with 10.15.2 said the macOS 10.15.3 update seems to have solved it.)

Also released are Security Update 2020-001 Mojave, & Security Update 2020-001 High Sierra (downloads below). Here's the article on security fixes in macOS 10.15.3 and Security Updates 2020-001 for 10.14.6/10.13.6. (See below for info on Safari 13.0.5, included in macOS 10.15.3, available for macOS 10.14.6/10.13.6.)

macOS 10.15.3 Delta & Combo Update Downloads
• Download macOS Catalina 10.15.3 Update ( 2.99 GB)
• Download macOS Catalina 10.15.3 Combo Update (4.59 GB)
  
  Security Update 2020-001 Downloads
  
• Download Security Update 2020-001 (Mojave) (1.62 GB)
• Download Security Update 2020-001 (High Sierra) ( 1.92 GB)

• Safari 13.0.5 includes security fixes, available for macOS 10.14.6 and macOS 10.13.6.
  (Safari update is included in macOS 10.15.3.)
  
  
• iOS 13.3.1 release notes (17D50).
• iPadOS 13.3.1 release notes (17D50).
  
• About the security content of iOS 13.3.1 and iPadOS 13.3.1.
  
  
• iOS 12.4.5 release notes (16G161).
  - "provides important security updates and is recommended for all users."
  (Security Updates page notes "This update has no published CVE entries".)
  
  
• tvOS 13.3.1 release notes (17K795) and security fixes.
  - This update includes general performance and stability improvements. (the usual note.)
  
  
• watchOS 6.1.2 release notes (17S796) and security fixes.

"Installation Note: The installer requires System Preferences to be launched during the installation process. Do not manually close System Preferences until after clicking Allow in the Security & Privacy Preferences, later in the process.

The installer also requires rebooting the system after the installation process. Do not launch any other applications until the process is complete and the system has been rebooted.

New in Release 387.10.10.10.40.134"
(No new info, same notes on D/L page as previous drivers, so I won't repeat it here.)

• Using Activity Monitor Part 1: CPU and Memory (sponsor blog)
  
  
• Apple Reports Record First Quarter Results (press release)
  
  
• Apple delivers a new redesigned Maps for all users in the United States (pr)
  
  
• How to Create Touch Bar Screenshots on a MacBook Pro (sponsor blog)
  
  
• Company of Heroes comes to iPad on 13 February (feral interactive)

• How to clean your Apple Pro Display XDR
  
  
• Mac Pro (2019) status indicator light behavior
  
  
• How to Set up and use iCloud Photos
  
  
• How to Find audio-described content in the Apple TV app or iTunes Store
  
  
• How to Authorize or deauthorize your computer for iTunes Store purchases
  
  
• If you can't stream or watch movies or TV shows from the Apple TV app, iTunes Store, or third-party apps
  
  
• How to Buy movies and TV shows from the Apple TV app
  (was titled "Download or stream movies and TV shows from the iTunes Store.")
  
  
• If music, movies, or TV shows from the iTunes Store, Apple Music app, or Apple TV app stop downloading
  
  
• If you can't connect to the App Store, iTunes Store, or other Apple services
  
  
• How to Find audio-described content in the Apple TV app or iTunes Store
  
  
• Resolve USB-related alerts in iTunes
  
  
• If you see an error in Finder or iTunes on your computer
  
  
• How to take a screenshot on your Mac
  
  
• Read books and more with Apple Books (app)
  
  
• What's new in the updates for macOS Catalina (added 10.15.3 info)
  
  
• How to Reset the System Management Controller (SMC) of your Mac
  
  
• How to Sync your iPhone, iPad, or iPod using your computer
  
  
• If you can't download or update apps on your iPhone or other Apple device
  
  
• Institutions that support health records on iPhone and iPod touch

• About the security content of iCloud for Windows 10.9.2 (Apple)
  
  
• About the security content of iTunes 12.10.4 for Windows (Apple)

January 20th to 24th, 2020 News Archive
• How to Setup Accelsior 4M2 card for Mac Boot Drive and RAID 0
• Safari Technology Preview 99 release notes
• Firefox 72.0.2 and Firefox ESR 68.4.2 Updates
• DisplayLink macOS App Beta for macOS Catalina
• How to Work With and Around macOS Gatekeeper
• All 3 Life is Strange adventures in one Mac App Store bundle
• Micromat Checkmate version 1.1.9 (fixes/improvements)
• "Life is Strange 2" game at the Mac App Store
• Yamaha AV Controller iOS App version 5.51 (bug fixes)
• SVS Subwoofer Control iOS App v1.3.50
• AMD Radeon RX 5600 XT Review (Sapphire Pulse)
• Samsung Portable SSD T7 Touch Review
• Apple Support/How-To/Troubleshooting Article Updates
  - If you see an error when you update or restore iPhone, iPad, or iPod.
  - If your computer doesn't recognize your iPhone, iPad, or iPod.
  - Get help with iOS update and restore errors.
  - How to change or reset the password of an macOS user account.
  - How to Install and replace memory in your 2019 Mac Pro.
  - How to Use Apple Pencil with your iPad or iPad Pro.
  - About LCD display pixel anomalies for products released in 2010 and later.
  - If Personal Hotspot is not working on iPhone or iPad (Wi-Fi + Cellular).

For links to older news pages, see the Archives.