Start with the basic steps, like checking your Internet connection, restarting the Mac, and checking if Siri is actually enabled. Try resyncing Siri on iCloud. Also, check if the microphone is set up ...
Ever been in a meeting where you're taking notes, looking things up, or just surreptitiously Slacking with your co-workers? If so, you might want to hide the constant clacking of your keyboard. If you ...