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# Xcode 10.3 Release Notes

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

## Overview

Xcode 10.3 includes SDKs for iOS 12.4, watchOS 5.3, macOS 10.14.6, and tvOS 12.4.
Xcode 10.3 supports on-device debugging for iOS 8 and later, tvOS 9 and later, and
watchOS 2 and later. Xcode 10.3 requires a Mac running macOS 10.14.3 or later.

### Instruments

#### Resolved Issues

- Resolved an issue where running an app in iOS 12.2 or later under the Leaks instrument
  resulted in random numbers of false-positive leaks for every leak check after the
  first one in a given run. (48549361)

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