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Apple's three forthcoming software updates were given new beta releases on Tuesday, allowing developers to test the latest builds of iOS 9, OS X El Capitan, and watchOS 2.
The fourth beta of iOS 9 is identified as build 13A4305g. It arrives less than two weeks after the third beta was supplied to developers.
The fourth beta of watchOS 2, meanwhile, is labeled as build 13S5305d, and El Capitan is 15A226f. All three software updates are scheduled to officially launch to the public this fall.
Being pre-release software, bugs unsurprisingly remain. For example, Apple has notified developers that there are issues with AirPlay, Apple Pay, CarPlay, HealthKit, HomeKit, iCloud Backup, Multitasking, Mail, Maps, Podcasts, Safari, Siri and much more.
On the Mac side, issues remain in El Capitan with Photos, Apple ID, and Language. Apple has also warned developers not to upgrade from OS X Lion or earlier to OS X El Capitan.
In the meantime, ambitious non-developers can still test iOS 9 and OS X 10.11 El Capitan by signing up for Apple's public beta program. iOS 9 is expected to launch in September alongside the next generation of iPhones. watchOS 2 is not available as a public beta.