Download the macOS Reference & Cheat using our secure order form! This handy, 4-page reference and cheat sheet contains tips, shortcuts, and an annotated list of features. Covers macOS Sierra and newer versions. The PDF can be read on practically any device or printed out. Your payment is secured by TLS, a higher grade of security than SSL, with 128-bit encryption and using modern SHA2 cyphers. Your payment is also processed using PCI Compliant service providers, which means that our providers meet current security standards for handling payment information. Your credit card statement will show a payment to the publisher, i30 Media.