If you tell me (e.g., installing on a 2011 MacBook, or running it in VMware on Windows), I can give you more specific instructions.

softwareupdate --fetch-full-installer --full-installer-version 10.12.6

: Allows for hands-free login if you are wearing a paired Apple Watch.

Released on September 20, 2016, macOS Sierra (version 10.12) marked a historic shift for Apple's desktop operating system, transitioning from "OS X" to "macOS" to better align with its other platforms like iOS and watchOS. Named after California's Sierra Nevada mountain range, this thirteenth major release introduced groundbreaking features such as Siri on the Mac, Universal Clipboard, and Optimized Storage.