Apple today seeded second betas of iOS 9 and OS X El Capitan to public beta testers, nearly two weeks after beta testers received access to the first public betas. Today's iOS 9 public beta offering has a build number of 13A4305g, which means content-wise, it's the same as the fourth iOS 9 beta that was seeded to developers yesterday. The version of OS X El Capitan public beta testers are receiving is also identical to El Capitan beta 4.

Beta testers who have signed up for Apple's beta testing program and already have the first public betas installed can update over-the-air for iOS 9 or through the Software Update mechanism in the Mac App Store for OS X.

The iOS 9 beta includes the return of Home Sharing for music, which was removed in iOS 8.4, and it's the first beta that supports Apple's new iPod touch. Other changes include a new look for Handoff in the app switcher and a bug fix that once again allows the volume buttons on an iOS device to serve as a shutter for the camera. A full list of changes in the beta can be found in our iOS 9 beta 4 tidbits list.

OS X El Capitan beta 4 focused more on performance improvements and bug fixes with few outward changes to the operating system.

Both iOS 9 and OS X El Capitan 10.11 are expected to be released in the fall.