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MacOS Sierra for Seniors: The perfect computer book for people who want to work with MacOS Sierra (Computer Books for Seniors series): Studio Visual Steps: 9789059054431: Amazon.com: Books
macOS High Sierra Introduction Quick Reference Guide (Cheat Sheet of Instructions, Tips & Shortcuts - Laminated Guide): Beezix Inc, Beezix Inc: 9781944684419: Amazon.com: Books
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macOS Sierra review: the Mac is now a mature platform | TechCrunch
Amazon.com: 6-in-1 USB installer for MacOS. El Capitan High Sierra Mojave Catalina Big Sur and Monterey