Apple today released the second Public Beta builds of both iOS 10 and macOS 10.12 Sierra. The news comes two days after Developer Preview 3, which should be identical to today's builds.
Apple is calling iOS 10 its biggest release of the OS ever. Indeed, quite a bit of it has been overhauled. There's an entirely new lock screen experience, overhauled Music, News, and Maps apps, and some apps have been opened up to extensions, such as Messages. Siri will be available to third-party developers as well.
The company's digital voice assistant was also the theme on macOS 10.12 Sierra, the successor to OS X. Aside from Siri, users will be able to unlock their Macs with their Apple Watches. Like in iOS 10, Photos will group your pictures by people, places, and things.
If you're on the public beta, you can get iOS 10 Public Beta 2 by going to Settings -> General -> Software Update, or you can grab the new build of macOS Sierra through the Updates tab of the Mac App Store. If you're not, you can sign up for the program right here.