Unfortunately, saying 'Hey, Siri,' does not work. Calling on Siri brings up a window with a waveform and a query asking what you need help with. Ask for help by clicking Siri's icon in the Mac menu bar, tapping its Dock icon, or using a keyboard shortcut. ProsĪpple's digital assistant moves in: Siri, the iOS personal digital assistant, is available in Sierra. MacOS Sierra version 10.12 moves Apple's desktop OS closer to its mobile counterpart, gaining Siri, Apple Pay, and more. The new Mac operating system offers more than a name change.