Apple has released the fourth developer beta of iOS 27, bringing several new features ahead of the official launch in September. Compared to previous betas, the changes are smaller but focused on enhancing user experience across the Apple TV app, Siri settings, camera, and connectivity.
Automatic Downloads for TV Shows
A highly anticipated feature is the new Automatic Downloads toggle in the Apple TV app settings. When enabled, the system will automatically download the next two episodes of shows you are watching in the Continue Watching section. Episodes will be deleted after viewing, saving storage space and ensuring seamless playback.
Zoom Photos to Fill Toggle and Wallpaper Removal
In the Photos settings, a new Zoom Photos to Fill toggle appears, enabled by default. It slightly zooms photos that nearly match the screen's aspect ratio, eliminating black bars. Additionally, Apple has removed the wallpaper feature from beta 3 that showed a cutout of the wallpaper subject in the Notification Center when swiping.
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Siri Voice Selection and Custom Voices
The Siri voice selection interface has been revamped. On devices without custom voice support, it now displays a menu with available voices and accents. On newer models like iPhone 17 Pro, iPhone 17 Pro Max, and iPhone Air, more custom voice options are available, with Apple promising additional voices soon. In Siri settings, a new option allows adjusting preview length in the Siri app (up to five lines or none), and an Always Show Request toggle in Accessibility shows a transcription of your speech on screen.
New ProRes Log 2 Format for Video
In Camera settings, when enabling Apple ProRes, users can now choose between Log and Log 2 formats. Log 2 retains more information in the file, offering greater flexibility for color grading and post-capture adjustments. This is especially beneficial for videographers and editors.
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Wi-Fi Connectivity Assist and Redesigned AirPods Options
A new toggle allows enabling or disabling Connectivity Assist per Wi-Fi network, independent of the master toggle. Apple has also redesigned AirPods options in Control Center, adding more choices for Adaptive mode.
Dual-Battery iPhone References
Code in beta 4 includes strings like "The batteries in this iPhone are performing as expected," hinting at an iPhone with two batteries. Rumors suggest this could be the foldable iPhone Ultra, which may adopt a dual-battery design for improved battery life. For more details, see our article on iOS 27 beta reveals references to dual-battery iPhone for foldable model.
For the original report, visit MacRumors.
Source: https://www.macrumors.com/2026/07/20/ios-27-beta-4-everything-new
