Here are all the ways your Mac is about to change

That means desktop files will appear on all devices you're logged into, including Macs, iPhones, and iPads.

For example, search 'cat' and get all your cat photos.

Apple does all its image recognition on your device and doesn't store your data on its servers.

Apple says this will save several gigabytes of space for many users.

This feature only works with web videos you watch in Safari. You can't use it with Chrome or Firefox. So far, only ESPN and Vimeo have enabled picture-in-picture video, but there's nothing stopping YouTube and others from adding it too.

Apple says most app developers won't have to change their code to use this feature. It will happen automatically in Sierra.

The rest of iTunes pretty much looks the same as before, unfortunately. iTunes is long overdue for a redesign.

You open Siri from the icon in the dock or the taskbar.

Here's the result when you ask for audio files, but you can search for documents, photos, and everything else.

That's not all, of course. Searches are pretty much the same as they are on the iPhone.

This is a useful way to find settings that are buried in a lot of menus.

There are a bunch of other features coming to Sierra that aren't live in the beta version yet. On top of everything you just saw, you'll also be able to use Apple Pay to shop in Safari (if the retailer supports it), unlock your Mac without a password if you're wearing your Apple Watch, and copy/paste items between your iPhone and Mac.