• macOS Monterey beta 7 (21A5522h)
• iOS 15.1 beta (19B5042h)
• iPadOS 15.1 beta (19B5042h)
• watchOS 8.1 beta (19R5541f)
• tvOS 15.1 beta (19J5542e)

• About the security content of Safari 15
  - Available for macOS Big Sur and macOS Catalina.
  - Apple's macOS Safari discussion forum.
  
  
• Xcode 13 released (for macOS 11.3 or later).
  - see linked page for change notes.
• About the security content of Xcode 13
  
  
• About the security content of iOS 15 and iPadOS 15
  (Some reports of internet connection problems after this update.
  If using a VPN or Security software, try disabling or removing it.
  Here's Apple's support article on VPN/3rd party software issues.)
• About iOS 15 Updates
• New features available with iOS 15
• What's new for enterprise in iOS 15
• iOS 15 press release
  
  
• About iPadOS 15 Updates
• New features available with iPadOS
• What's new for enterprise in iPadOS 15
• iPadOS 15 press release
  
  
• About watchOS 8 Updates
• watchOS Feature Availability
• About the security content of watchOS 8
• watchOS 8 press release
  
  
• What's new in tvOS 15
• About the security content of tvOS 15
  
  
• Apple TV 3rd generation software updates (added v7.8)
  - This update includes general performance and stability improvements.

• Get Ready for iPadOS 15: Widgets and App Library (sponsor blog)
  
  
• A First Look at Apple's iOS 15 "Private Relay" feature (isc.sans)
  
  
• Mini-tip: How to Make Secure Notes in Keychain (sponsor blog)
  
  
• Apple's "Ted Lasso" wins Outstanding Comedy Series at Primetime Emmy Awards (pr)
  
  
• The issues with macOS Big Sur, Time Machine, HFS volumes, & APFS (sponsor blog)
  
  
• iTunes U version 3.8.3 (app store link)
  (Available for iOS 12.4 and later or iPadOS 12.4 and later.)
  - This update includes usability and stability improvements.
  - iTunes U will be discontinued at the end of 2021.
• About the security content of iTunes U 3.8.3
  
  
• Pixelmator Pro version 2.1.4 (app store link, macOS 10.14.4 or later)
  "v2.1.4 adds the ability to apply layer styles to RAW layers and includes a few other improvements and fixes." (See linked page for more info.)
  
  
• How to Use Automator to Manipulate Images: 5 Easy Tips (sponsor blog)
  
  
• A Big Sur forum post claims macOS 11.6 broke DVD Playback on his M1 Macs. (A friend has a M1 mini, but she's still on 11.5.2. She had CVMServer crashes when playing DVDs after macOS 11.2 update (fixed in 11.3.1), but those crashes didn't stop DVD playback or cause a system crash. They were only shown in Console logs.)
  
  
• Apple support article on Exposure to vibrations might affect iPhone Cameras
  "Exposing your iPhone to high amplitude vibrations within certain frequency ranges, specifically those generated by high-power motorcycle engines, can degrade the performance of the camera system..."

• Watch the Apple Event from September 14, 2021 (video)
  
  
• Apple unveils iPhone 13 Pro and iPhone 13 Pro Max (pr)
  
  
• Apple introduces iPhone 13 and iPhone 13 mini (pr)
  
  
• Apple unveils new iPad mini (pr)
  
  
• Apple's most popular iPad delivers even more performance & advanced features (pr)
  
  
• Apple reveals Apple Watch Series 7 (pr)

"This update is recommended for all users and improves the security of macOS."

macOS 11.6 is build 20G165 (11.5.2 was 20G95), so maybe there's other fixes included. You can check the Big Sur forum for feedback, and the Mac Mini, iMac, MacBook Pro, & MacBook Air forums.
FYI: Some macOS 11.4 users said 11.6 didn't appear in software update check and wouldn't install via terminal commands. After installing macOS 11.5.2 from the app store, then 11.6 was available.
(The usual advice on software updates, 3rd party VPN/security software applies.)

Article on security fix
• About the security content of Security Update 2021-005 Catalina
  
  Download Page for the Security Update
• Download Security Update 2021-005 Catalina (1.45 GB)
  - After installing the macOS Catalina build number is 19H1417.

"* After installing this update, the build number for Safari 14.1.2 is 14611.3.10.1.7 on macOS Mojave and 15611.3.10.1.7 on macOS Catalina."

• About the security content of iOS 14.8 and iPadOS 14.8
• iOS release notes & iPadOS release notes for 14.8:
  "This update provides important security updates and is recommended for all users."
  
  
• About the security content of watchOS 7.6.2
• watchOS release notes for 7.6.2:
  "This update provides important security updates and is recommended for all users."

• Chrome 94.0.4606.54 Stable Channel Update for Desktop includes 19 security fixes.
  
  
• iOS Chrome browser version 94.0.4606.52 (for iOS 13.0 or later)
  - See linked page for changes. (Also read user reviews.)
  
  
• About the security content of iTunes 12.12 for Windows
  
  
• Incompatibility Issue Between myLTO and LTFS Tools (sponsor blog)
  
  
• Microsoft Office for Mac (365/2019) version 16.53 (build 21091200)
  - See Sept. 14 release notes for changes. (Includes security update for Excel.)
  
  
• Microsoft September 2021 Patch Tuesday (isc.sans)
  
  
• 03.15.95 Firmware Update for 2021 LG C1/G1/R1 OLED TVs
  - post includes update info and firmware download pages.
  
  
• 03.23.35 Firmware Update for LG CX/GX/WX OLED TVs
  - post includes info and firmware download pages.

• Apple web server acknowledgements (security fixes) (Sept 22)
  (new format no longer includes the domain/server that was affected.)
  
  
• Use widgets on your iPad (with iPadOS 15) (Sept 20)
  
  
• Use widgets on your iPhone and iPod touch (Sept 20)
  
  
• If your iPhone is stuck on the Apple logo (Sept 20)
  
  
• If you get a personalization error when reinstalling macOS on your Apple M1 chip Mac (Sept 17)
  
  
• Find out which macOS your Mac is using (Sept 13)
  
  
• Exposure to vibrations, like those generated by high-powered motorcycle engines, might impact iPhone cameras (Sept 10)
  
  
• Obtaining service for your Apple product after an expired warranty (Sept 9)
  - originally titled "Vintage and Obsolete products".
  
  
• How to Use Apple products on enterprise networks (Sept 1)
  
  
• How to reinstall macOS (Aug 27)
  - Has separate instructions for Apple silicon Macs and Intel CPU Macs.
  
  
• Identify counterfeit or uncertified Lightning connector accessories (Aug 27)
  
  
• How to update your iPhone, iPad, or iPod touch (Aug 25)
  
  
• If You Forgot the Passcode for your iPhone, or your iPhone is Disabled (Aug 20)
  
  
• (How to) Rebuild the Spotlight index on your Mac (Aug 18)

September 6th to 10th, 2021 News Archive
• Firefox 92.0, Firefox ESR 91.1, & Firefox ESR 78.14 Updates.
• Micromat Lifespan 1.0.4 update.
• How to use macOS Automator: Part 1 The Basics.
• Firefox Focus: Privacy browser v37.0 for iOS 13.6 or later.
• The Road to macOS Monterey: iCloud+.
• WordPress 5.8.1 Security and Maintenance Release.
• Vulnerabilities fixed in Thunderbird 78.14.
• LG B7/C7/E7/W7 OLED TVs Firmware Update 06.00.25.
• Apple Support/How-To/Troubleshooting Article Updates.

For links to older news pages, see the Archives.