Once you’ve updated to Apple’s latest—iOS 10.3, macOS 10.12.4, and watchOS 3.2—you’ll want to read this article.
For whatever reason, Apple didn’t see fit to enable the “Hey, Siri” trigger for Siri in macOS Sierra, but there’s a sneaky way you can configure your Mac to be able to invoke Siri without using the keyboard or mouse. We have step-by-step instructions on our blog.
In macOS Sierra, you can use Desktop and Documents folder syncing via iCloud Drive to create unified Desktop and Documents folders across all your Macs, and as an added bonus, you can access the contents of those folders from all your iOS devices. But you should be aware of the ramifications of enabling this feature before you do so—read more on our blog.