Who does macOS High Sierra affect? The launch of macOS High Sierra affects Mac users and admins who have a compatible system and are planning on upgrading to the OS, or non-Mac users who are planning to purchase an Apple computer in the future.Why does macOS High Sierra matter? As a version of macOS, High Sierra will define the user experience for Apple computer users across laptops and desktops in terms of featureset and UI.It builds on its predecessor, macOS Sierra, and includes updates to Safari, Mail, Photos, its file system, and more. What is macOS High Sierra? macOS High Sierra is version 10.13 of Apple's desktop operating system (OS) series, macOS.SEE: All of TechRepublic's cheat sheets and smart person's guides Executive summary This is a 'living' article that will be updated and refreshed as new, relevant information becomes public. To help tech leaders and IT pros better understand macOS High Sierra, we've put together the most important details and resources in this cheat sheet. While the updates may seem simple, they help set the stage for Apple's approach to computing in the future. With High Sierra, version 10.13 of Apple's macOS operating system, the company added subtle updates to improve the privacy of web browsing in Safari, rolled out its new file system as standard, and introduced updates that would allow for the creation of virtual reality (VR) and augmented reality (AR) content.