Hide Siri's window on macOS Sierra

Solution 1:

Without Type to Siri enabled, you may close the Siri window at any time by pressing the ESC key. However, I am unaware of a way to automatically close Siri after some time has passed or by using the keyboard with Type to Siri.

Solution 2:

If you've enabled "Type To Siri" and find that ESC doesn't close the window, try typing "nevermind" and hitting enter. In my case, Siri replies "ok" and the window closes.

A further refinement is to set up a keyboard shortcut for nevermind "nmd" to save on the typing. "bye" also closes the window but Siri says it is "Nice talking with you" and that is more annoying than "ok". Of course you can also suppress Siri read responses, and you probably have if you're using "Type To Siri".

Solution 3:

Another option (besides the esc key) is cmd+..

This is useful if you're on a MacBook Pro with Touch Bar, and you're in an app where the esc has turned into something else (like while playing full-screen video).