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Apple is now on its fourth and potentially final round of betas for its current operating system generation, with golden master builds of iOS 13.6, iPadOS 13.6, tvOS 13.4.8, and watchOS 6.2.8 now available to download by developers. The company also issued a fresh beta for macOS 10.15.6.
The latest builds can be downloaded by developers in the beta-testing scheme via the Apple Developer Center, or as an over-the-air update for hardware already using earlier beta builds. A public beta version of the releases is expected to start arriving soon, and will be available through the Apple Beta Software Program website.
The fourth round of betas replace the third-round issued on June 30. The second round for iOS 13.6, iPadOS 13.6, tvOS 13.4.8, and macOS 10.15.6 arrived on June 9 followed by watchOS 6.2.8 on June 10. The first betas of iOS, iPadOS, and macOS landed June 1, with watchOS and tvOS on June 3.
The fourth round of betas for iOS 13.6, iPadOS 13.6, tvOS 13.4.8 and watchOS 6.2.8 are tagged as GM versions, but according to Apple's developer portal, macOS 10.15.6 beta 4 is not.
Both AppleInsider and Apple strongly suggest users avoid installing betas on to "mission-critical" or primary devices, due to the potential for data loss or other issues. Instead, the recommendation is to install betas onto secondary or non-essential devices, and to ensure there are sufficient backups of important data before making any major changes.
Update: Public beta versions of iOS 13.6, iPadOS 13.6, tvOS 13.4.8 and macOS 10.15.6 are now available.