As promised, Apple is is launching its public beta program for iOS 10 and macOS Sierra, giving anyone a chance try all the new features ahead of the official release expected in September. The release is based on the second developer seed, which was issued yesterday, so keep in mind that while the software is stable enough for a public beta, it is by definition unfinished software and you are advised not to install it on your primary devices.

For early adopters who want a head start on using some of the new features, all you need to do is go to Apple’s Beta Software Program site, click the blue “Sign Up” button, sign in with your Apple ID and agree to the terms of the beta.

Among the things you’ll be able to try out in Apple’s latest mobile platform are a new lock screen and revamped notifications, improved predictive keyboard, more intelligent photo sorting and searching using advanced computer vision and deep learning techniques, a completely overhauled iMessage with a heavy injection of animations.

Not every new feature will be live, though. Siri’s ability to work with third-party apps won’t be available until developers get access to the required APIs, for example, there’s no Apple Pay on the web, voicemails transcriptions, or being able to make a WhatsApp or Skype call from the Phone app. For most of that we’ll have to wait until the final version hits,

On macOS Sierra you can look forward to an improved iCloud Drive and Optimized Storage that will make managing files and freeing up local storage easier, auto unlock (if you have an Apple Watch too), and use Siri as you would on your phone.

Apple’s new desktop operating system will be compatible with late-2009 and later MacBook and iMac, as well as 2010 and later MacBook Air, MacBook Pro, Mac mini and MacPro. As for iOS 10, you’ll need an iPhone 5 or newer to upgrade but not all features work on every model.