Apple Support/How-To/Troubleshooting Article Updates

- Find out which macOS version your Mac is using.
- Apple Diagnostics Reference codes.
- Create a bootable installer for macOS.
- Apple web server security acknowledgements.
- About encrypted backups on your iPhone, iPad, or iPod touch.
- Locate backups of your iPhone, iPad, and iPod touch.
- How to back up your iPhone, iPad, and iPod touch with your Mac.
- If your computer doesn't recognize your iPhone or iPad.
(More at linked page.)