iOS
• In the Camera app, Portrait mode blur effect might render incorrectly for photos. (177335723)
• (CarPlay) Your vehicle’s next and previous track steering wheel buttons might not function correctly in CarPlay. (177832695)
• You might be unable to stop a ringing alarm from the lock screen without unlocking your device. (177728602) Workaround: Unlock your device, or say “stop the alarm,” or say “stop music.”
• (Messages) GIFs and pasted images might render as the incorrect size. (177657977)

In apps built with the 27.0 SDKs, the new ReadableDocument and WritableDocument protocols support asynchronous reading and writing, progress reporting, and direct access to document URLs. New DocumentGroupinitializers that adopt these protocols let you disable document creation for editing-only apps and present custom UI before any document is opened. The initializers expose an Observable URLDocumentConfiguration and integrate with Swift concurrency and the Observationframework. New applications should prefer ReadableDocument and WritableDocument over ReferenceFileDocument, which remains available.

The menu bar on iPadOS 27.0 and macOS 27.0, as well as context menus on macOS 27.0, present a reduced set of menu item images. By default, SwiftUI now hides all menu item symbol images in most contexts, while non-symbol images remain visible. Review the updated Human Interface Guidelines to determine which menu items in your app should still display images. Use the labelStyle(_:) view modifier with the .titleAndIcon style to indicate that a menu item Label’s icon should always be shown — such as when the menu item represents an object or a concept rather than an action. SwiftUI continues to automatically provide default visible menu item images for certain common system-wide menu items, such as Settings, Share, and Print. (170480710)