Here are sites that containing tutorials related to Apple Products and Applications (mostly FOSS apps)
Apple’s Official Support:
Find answers. Ask questions. Connect with Apple customers around the world.
Choose an Apple product or search to view related documents and available downloads.
Apple’s Official Tutorials:
Topics: Get started, Add a personal touch, Stay connected, Multitask with iPad, Boost your creativity, & Set up features for kids.
iPhone User Guide
Topics: Get started, Add a personal touch, Take your best shot, Stay connected, All in the family, Simplify your day, & Pro tips.
macOS User Guide
Topics: Get started with your Mac, Switched from Windows to Mac?, Use your Mac with other Apple devices, Your Mac makes tasks easier, Keep your work private and secure, Forgot your password?, Get your Essentials guide, & Contact Apple Support.
Vision Pro User Guide
Topics: Introducing Apple Vision Pro, First things first, Keep in touch, Get work done, & Watch, listen and play.
Application Tutorial Links:
Video Tutorial Sites:
MacMost
(Apple General)
MacMost is a video podcast and blog that teaches you how to use your Mac, iPad and iPhone. At MacMost.com you will find more than 2,000 videos, a weekly newsletter, tips, and recommendations. You can contact MacMost via email.
TechTalk
(mostly macOS)
David A Cox: Tech Talk America was born when I decided to marry my two passions together; video production and teaching tech to people who do not identify as being tech savvy.
Davies Media Design
(Gimp, WordPress, Inkscape, darktable)
Gimp (proto editing), WordPress (web design), Inkscape (graphic design), & darktable (RAW processing) tutorials.
