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# iOS & iPadOS 18.6 Release Notes

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

## Overview

The iOS & iPadOS 18.5 SDK provides support to develop apps for iPhone and iPad running iOS & iPadOS 18.6. The SDK comes bundled with Xcode 16.4, available from the Mac App Store. For information on the compatibility requirements for Xcode 16.4, see [Xcode 16.4 Release Notes](/documentation/Xcode-Release-Notes/xcode-16_4-release-notes).

### HealthKit

#### Known Issues

- Health data becomes inaccessible when you reach the “slide to power off” page on an iPhone or iPad without a passcode.  (154706523)
  
  **Workaround:** Add a passcode or reboot the device.

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