Contents

Xcode 27.3 Beta Release Notes

Update your apps to use new features, and test your apps against API changes.

Overview

Xcode 27.3 beta includes Swift 6.4 and SDKs for iOS 27.3, iPadOS 27.3, tvOS 27.3, watchOS 27.3, macOS 27.3, and visionOS 27.3. Xcode 27.3 beta supports on-device debugging in iOS 17 and later, tvOS 17 and later, watchOS 10 and later, and visionOS. Xcode 27.3 beta requires a Mac running macOS Tahoe 26.6 or later.

See Xcode Support to learn more about compatible platforms and deployment targets.

Coding Intelligence

New Features

  • GitHub Copilot is now available in the coding assistant. (185837709)

Device Hub

New Features

  • You can now drag items onto a device in Device Hub. Drop an app (.app or .ipa) to install it, or drop a link to open it on the device. On iOS simulators, drop any other file to save it with the Files app. (179246120) (FB23037189)

Resolved Issues

  • Device Hub now supports using option-drag to simulate two-finger touch gestures for iPhones and iPads. (169537162)

  • Device Hub now accepts keyboard and mouse input for OS simulators earlier than iOS 18.0, tvOS 18.0, watchOS 11.0, and visionOS 2.0. (190652440)

Known Issues

  • Device Hub support for CarPlay requires devices to be physically connected via USB cable (not over the network). iOS Simulator is not supported for CarPlay. (179494052) (FB23101450)

  • When using Device Hub via Sidecar or a Mac with Touch, only two touches can be sent to the target device. Three or more touches are interpreted by macOS as a system gesture. (185140491)

    Workaround: Turn off touch gestures in Settings under Touch Display.

Previews

New Features

  • RenderPreview MCP tool snapshot filenames and metadata now include the applied overrides. (176531615)

  • RenderPreview MCP tool now supports interactive delayed snapshots for macOS previews. (181244878)

Resolved Issues

  • A clearer error is now shown when the sandbox blocks a library from loading in a preview. (147269145)

  • macOS widget previews now fail with a clear error. (178635433)

  • Fixed a crash that could occur when building a preview after the workspace closes. (183679367)

  • Fixed excessive processing time for source files that contain long operator chains. (184132564)

  • Fixed an issue where previews refreshed unnecessarily when an Xcode project or workspace had not changed. (187278576) (FB24753484)

  • Previews now refresh when asset catalog contents change on disk. (187456273) (FB24785391)

  • Fixed an issue where the RenderPreview MCP tool could report no previews before they finished loading. (188424749)

  • Fixed an issue where the RenderPreview MCP tool could render a different preview than the one requested. (188817121)

  • Fixed a crash that could occur when changing code while in the Resizable Canvas mode. (189463909)

Simulator

Resolved Issues

  • Fixed: Simulator runtimes might be inaccessible to users who are in the daemon group. (User accounts should not be added to the daemon group.) (190649396)

Swift Testing

New Features

  • Xcode now supports writing UI tests with Swift Testing and XCUIAutomation. (95593221)

UI Automation

New Features

  • XCUIAutomation supports setting the hinge angle on iPhone Duo with a new XCUIHinge class. (187479559)

Xcode AEA

New Features

  • Xcode is now available as an Apple Encrypted Archive (.aea). If you’re installing Xcode from the command line, use archiveutil extractXcodeAEA to extract the Xcode archive.

    Xcode 27.3 is the final release supporting the .xip format. (111337953)

See Also

Xcode 27