Apple has released the second version of both its iOS 9 and OS X El Capitan public betas to early-adopting users, bringing tweaks and bug fixes to pre-release software.
If you're already using the first iOS 9 beta, you can install the update by navigating to General and then Software Update within the Settings app. As per usual, it's best to make a backup before installing beta software. If not, you can head over to Apple's beta websiteto enroll your devices in the beta program.
For OS X El Capitan, users should be able to update via the Mac App Store.
The second public beta for iOS 9 brings back Home Sharing, a way to play iTunes media across devices in the same household, which was removed in iOS 8.4. It also reinstates the ability to use the volume buttons as shutter buttons for the camera. It's also now supported on the new iPod touch. The El Capitan beta is simply focused around stability and bug fixes.
The first public betas for both operating systems were released two weeks ago, but the iOS 9 release was more notable. It became the very first time Apple made a pre-release version of iOS software available to the public. The company usually only releases beta software to developers. The move to open the software up to more people is likely aimed at finding and squashing more bugs before the official version is released.
In our limited testing with iOS 9 beta 2, the OS seems faster and potentially more stable. Still, you'll probably want to wait before putting it on your main device.