Mark Gurman:

Instead of integrating Siri as a swipe menu akin to the Mac’s Notification Center or as a full screen view like on the iPhone and even the iPad Pro, Siri for the Mac will live in the Mac’s Menu Bar. Similar to the Spotlight magnifying glass icon for search and notifications icon for Notification Center, a Siri icon in the top right corner of the menu bar will activate the voice control feature.

At last! I hope Siri also gains the ability to understand multiple languages in one sentence, eg. ‘Hey Siri, give me travel directions to Grande Anse des Salines’.

Siri on the Mac will have its own pane in System Preferences and users are said to also have the option to choose a keyboard shortcut for activating the service. Like with recent versions of iOS, users will be able to enable Siri at the first startup of OS X 10.12, according to sources. If the Mac running the new OS X version is plugged into power, a “Hey Siri” command will work much like with recent iPhone and iPad models.

That would be strange, especially considering the ‘Hey Siri’ works on the most recent iPhones and iPads without the devices needing to being plugged in.