Amazon.com: Apple MacBook Pro 13in 2.8GHz i7 Retina (ME867LL/A), 16GB Memory, 512GB Solid State Drive, MacOS 10.12 Sierra (Renewed) : Electronics
macOS Sierra For Dummies (For Dummies (Computer/Tech)): 9781119280651: Computer Science Books @ Amazon.com
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 Support Essentials 10.12 - Apple Pro Training Series: Supporting and Troubleshooting macOS Sierra: 9780134713854: Computer Science Books @ Amazon .com