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# Xcode 27.2 Beta Release Notes

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

## Overview

Xcode 27.2 beta includes Swift 6.4 and SDKs for iOS 27.2, iPadOS 27.2, tvOS 27.2, watchOS 27.2, macOS 27.2, and visionOS 27.2.
Xcode 27.2 beta supports on-device debugging in iOS 17 and later, tvOS 17 and later, watchOS 10 and later, and visionOS.
Xcode 27.2 beta requires a Mac running macOS Tahoe 26.6 or later.

> Important: The iOS SDK and simulator support for iPhone Duo will be available later this month in an upcoming release of Xcode 27.1.

See [Xcode Support](https://developer.apple.com/support/xcode/) to learn more about compatible platforms and deployment targets.

### General

#### Known Issues

- Xcode may crash when using code completion on macOS 27.2 beta.
  (186939138)
  
  **Workaround:** Turn off code completion in Settings > Editing > Completion > Display code completions while typing > Never

### Device Hub

#### Known Issues

- Keyboard and mouse inputs to simulators for OS versions before iOS 18.0, tvOS 18.0, watchOS 11.0, and visionOS 2.0 are not accepted.
  (181945323)
- After disconnecting a physical device from Device Hub when “Simulate Hardware Keyboard” was in use, the device may remain in “hardware keyboard” mode for up to 2 minutes. This will cause the software keyboard to not appear when selecting a text field.
  (182553164)
  
  **Workaround:** Wait 2 minutes for the condition to clear.

### Previews

#### Resolved Issues

- Fixed an occasional issue where selecting a preview from a preview group’s thumbnail grid on macOS would fail to 1-up the right preview.
  (183475595)
- Fixed: A clearer error is now shown when the selected platform does not support a preview’s content.
  (185436582)
- Fixed: The RenderPreview MCP tool now returns the list of available render destinations, and lets the caller specify which destination to use for rendering.
  (186442676)

### Previews & Playgrounds

#### Resolved Issues

- Fixed: A clearer error with recovery steps is now shown when previews fail because another user account on this Mac owns the Previews JIT directory.
  (184564292)

### Project Format

#### New Features

- Xcode now supports a JSON-based project format (.xcproj) that’s more readable, merge-friendly, and easier for coding agents to edit. Enable it in the file inspector. Projects using .xcproj also open in earlier versions of Xcode 27.
  (184661114)

### SDK

#### Known Issues

- macOS, watchOS, tvOS, and visionOS SDKs in Xcode 27.2 incorrectly report 27.1 as a valid deployment target. Builds and other functionality may have unexpected behavior if this deployment target is used. Mac Catalyst builds with a 27.1 or 27.2 deployment target may be unable to use newly introduced API.
  (187160501)

### Simulator

#### Known Issues

- Some simulator runtimes are not completely deleted when removed, re-appearing after a reboot.
  (141290052) (FB16083602)

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