How to Configure, Use, and Disable Siri in macOS Sierra
 

Unless you’re a Mac user who’s terribly out of the loop, you probably know that Siri has arrived on the latest version of Apple flagship desktop OS: macOS Sierra. Thankfully, Siri can be easily turned on and off or configured to your liking.

http://www.howtogeek.com/272635/how-...-macos-sierra/