Amazon.com: 2017 Apple MacBook Air with 1.8GHz Intel Core i5 (13-inch, 8GB RAM, 128GB SSD Storage) (Renewed) : Electronics
The Complete Beginners Guide to Mac OS X Sierra (Version 10.12): (For MacBook, MacBook Air, MacBook Pro, iMac, Mac Pro, and Mac Mini): La Counte, Scott: 9781537798684: Amazon.com: Books
macOS Support Essentials 10.12 - Apple Pro Training Series: Supporting and Troubleshooting macOS Sierra: 9780134713854: Computer Science Books @ Amazon .com