Siri has been the personal assistant for iOS since it was first seen on the iPhone 4S in October 2011. Helping it's users find out information by using voice dictation was certainly a great aid to personal productivity (when Siri understood the question correctly of course, which is a whole different conversation!). When iOS 8 was released in September 2014, we gained the ability to activate Siri by speech, as opposed to pressing the Home button. When connected to a charger, Siri would respond to a "Hey Siri" command. Handy.
With the introduction of macOS Sierra, Siri finally found it's way onto our desktops, however minus the ability to invoke Siri with your voice.
The good news is that with a bit of trickery, you can bypass this and shout "Hey Siri" to your heart's content, whilst getting frustrated with the results and fighting the urge to throw your device at the nearest wall. Although maybe that's just me and my strange English accent.
Let's run through the process:
1 - Turn on Enhanced Dication
Go to System Preferences -> Keyboard -> Dictation and select the Use Enhanced Dictation check box. You will be told that this will allow offline use of Voice Dictation resulting in a download being required.
2 - Enable the Dictation Keyword Phrase
Here we are going to set the phrase that your Mac will listen out for to enable Voice Dictation. I wonder if you can guess what it is...
Go to System Preference -> Accessibility -> Dictation
Select Enable the Dictation Keywork Phrase and type in the word hey
3 - Enable Advanced Dictation Commands to invoke Siri
From the same window, select Dictation Commands. Check the Enable advanced commands box and then click the plus button to add a new command.
In the When I Say box, type Siri. Keep While using set to Any Application In the Perform drop down box, select Open Finder Items and navigate to the Siri application.
Now that you know how to complete this to activate Siri, just think of the other potential uses for Voice Dictation that you may not otherwise have known about....