Keeping up with the one per week cycle, apple has updated all of its developer betas, with seventh releases of iOS 11, macOS 10.13 High Sierra, tvOS 11, and watchOS 4. [Updated with public beta info]
macOS 10.13 High Sierra
The macOS High Sierra update, with build number 17A352a, contains a number improvements like Apple File System integration, migration from H.264 to H.265, and Metal 2, alongside other refinements. The previous beta sported build number 17A344b.
Alongside beta 5 of High Sierra, Apple launched a Safari extensions section of the Mac App Store. This most recent beta version adds APFS support to the 2012 Mac Pro tower.
The most notable changes in iOS 11 overall are back-end enhancements and an improved voice for Siri, plus Apple Pay and Photos services enhancements. The Do Not Disturb While Driving feature was introduced during the second beta. The seventh beta of iOS 11 has build number 15A5362a, with the previous holding number 15A5354b.
The "Messages in iCloud" feature was removed in the iOS 11 beta 5 release, and Apple claims that it will ship in a future software update to iOS 11. Users can continue to receive and store messages on each device, and they can continue to backup and restore messages using iCloud Backup.
Release notes for the fifth tvOS beta remain very short, with very few issues noted or changes specified. The previous tvOS build was numbered 15J5360b, and the current has been incremented to 15J5369a.
Apple's watchOS beta 4 has build number 15R5365a. Prior betas delivered the announced "Toy Story" watch faces to testers, and also fixed issues related to haptic feedback, music playback, location-based HomeKit triggers and Siri usability. The previous built was build number 15R5357b.
The previous updates were on August 14, with it only a week after the previous beta.
Update: A public version of the iOS 11 beta is available for people registered in Apple's Beta Software Program.