Apple has made the first public beta of iOS 9 and OS X El Capitan generally available. Anyone can enrol and get download instructions at beta.apple.com. Public beta release is meant for users who wants to preview the upcoming operating systems. Public beta users can easily submit feedback for issues using the Feedback Assistant app prior to the stable release this fall. As with all beta software, only install iOS 9 and OS X El Capitan public beta on your non-critical iOS device and Mac.