We have many A-Z keywords for this term.
These are the linked keywords we found.
Talk about big news. No matter what you’re working on, your intelligent personal assistant is always a click away. The handy features of Siri on iOS are now on your Mac, along with brand-new ways to help you with the things you do every day on your desktop.
Edit a video without using a mouse or trackpad. Build a presentation without seeing the screen. Or track down important files for your next project with just your voice. Because Mac is designed for everybody to create amazing things.
macOS (pronounced / ˌ m æ k oʊ ɛ s / ;  previously Mac OS X , then simply OS X ) is the current series of Unix-based graphical operating systems developed and marketed by Apple Inc. designed to run on Apple's Macintosh computers, having been preinstalled on all Macs since 2002. Within the market of desktop, laptop and home computers, and by web usage, it is the second most widely used desktop OS after Microsoft Windows .  
Commands marked • are bash built-in commands. bash is the default shell, it runs under Darwin the open source core of OS X. OS X Man Pages - Apple Developer Connection Discussion forum Links to other Sites, Books etc ...
TinkerTool is an application that gives you access to additional preference settings Apple has built into macOS. This allows to activate hidden features in the operating system and in some of the applications delivered with the system.