Call Siri on MacOS Sierra Using a Keyboard Shortcut
Siri is one of Sierra’s iconic features , but while you can invoke it in three different ways, the keyboard shortcut is probably the most useful.
By default, you can bring up Siri by clicking the icon in the menu bar, in the Dock, or by pressing the keyboard shortcut: hold Command + Spacebar. You can change this keyboard shortcut to any by choosing System Preferences> Siri and clicking the Keyboard shortcut drop-down menu.