Is your Mac stuffed fit to burst? Do you look at the Finder’s Status Bar, see “1GB available,” and then give up what you were doing and go check Twitter instead? What if I told you that you could offload much of the junk/important data on your Mac to iCloud, just like you do with your iCloud Photo Library? Well, you can, and it’s easy. It’s called Optimized Storage.

This is a guest post by Vera Tkachenko, a software team lead at MacPaw.

For the first time, the Mac operating system comes with cleaning tools. The new Optimized Storage feature in macOS Sierra might not sound like much at first, but its very presence in the new Mac operating system undermines the long-held notion that OS X is self-cleaning and remains fast and glitch-free on its own.

Why did Apple add this functionality? Let’s check under the hood of the new macOS cleaning tools to find out what they do, why they do it — and how they might have done it better.

With macOS Sierra, Apple makes it easier to free up space on our computers without having to undergo the time-wasting indignity of trawling through files and deleting them manually.

The new “Optimized Storage” feature helps you deal with junk like duplicates, old email attachments and downloads — and automatically sifts through them to delete the files or move them to the cloud. It’s one of macOS Sierra’s best features.

Here’s how you can use it to your advantage if you’re running the new operating system, which is currently in public beta and will be released this fall.

Although WWDC is a developer event, Apple’s keynote today was chockablock with features for end-users. It came thick and fast, with updates for watches, TVs, phones and computers.

There’s lots to unpack. Some of it was ho-hum. Siri on the Mac? Meh. A new app called Breathe? To do what exactly — remind you to inhale?

But there was tons of great stuff. Here are the features big and small that we’re most excited about.