In addition to iOS 9, Apple on Wednesday seeded the second public beta of OS X El Capitan to testers. The release comes just a day after beta 4 of El Capitan was pushed out to developers and two weeks after the first public beta.
The new build is available to registered public testers who are already on beta 1 via the Updates section of the Mac App Store, or through the beta web portal as a standalone download. You can enroll in the program by clicking here.