Mac OS Sierra - What can your
Mac do now? Just ask. Siri makes its debut on Mac, with new
capabilities designed just for the desktop. Your Mac is smarter.
macOS Sierra helps you rediscover your best photos, shop faster
and more conveniently online, and work more seamlessly between
devices. It can also help free up valuable storage space. Now
your Mac does even more for you, so you can do more with your
Mac OS Sierra v10.12