macOS Sierra brings several new features as well as other enhancements such as:
- Siri has been added to the Mac and can be easly accessed from the Dock, menu bar or keyboard and lets you use your voice to make commands and search
- Automatically have all the files on your Desktop and in your Documents folder on any Mac, iOS device or even PC
- Continuity across Apple devices now supports Universal Clipboard
- The Tabs feature from Safari has been expanded across Mac apps that support multiple windows, including Maps, Mail, Pages, Numbers, Keynote and TextEdit, and even third-party apps
- The ability to float a video from Safari or iTunes in a window over your desktop as you work, and even resize, drag and pin video to any corner of your screen
- The ability to make online purchases via Apple Pay, and complete them sing Touch ID on your iPhone or by using your Apple Watch
- The new Memories feature in Photos helps you rediscover favorite and forgotten moments deep in your Photos library by automatically creating curated collections based on occasions, people, places and more
- Auto Unlock lets you simply walk up to your Mac while wearing your authenticated Apple Watch and be automatically logged into your desktop
- Optimized Storage frees up space when your Mac starts getting full by storing infrequently used items in iCloud and reminding you to delete used app installer
- Messages now allowing you to preview web links and watch video clips within the app, post reactions and use bigger emoji for more message impact
- Apple Music in iTunes makes it even easier to discover new music and browse exclusives and new releases
