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Apple on Thursday issued fourth beta releases of of iOS 10.3.3 and tvOS 10.2.2 to the developer community, just a day after running the gamut of betas for the operating systems announced at WWDC.
The iOS and tvOS updates can be downloaded through Apple's developer portal, or through the software update feature on properly configured and registered devices.
Nothing of note was found with the previous betas other than some new wallpaper graphics which were included in the 12.9-inch iPad Pro refresh and the new 10.5-inch iPad Pro revealed at WWDC.
Also underway are tests on the second developer beta releases of iOS 11, macOS 10.13 High Sierra, watchOS 4 and tvOS 11.
Apple's iOS 11 appears to carry the most changes, with upgrades to Siri, Apple Pay, Photos and a general user interface revamp. The macOS High Sierra update contains a number of refinements to Sierra and other improvements like Apple File System integration, migration from H.264 to H.265, and Metal 2.
Update: Apple has also made the latest iOS 10.3.3 beta available to public testers.