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# Xcode 11.5 Release Notes

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

## Discussion

Xcode 11.5 is available in the Mac App Store and includes SDKs for iOS 13.5,
iPadOS 13.5, tvOS 13.4, watchOS 6.2, and macOS Catalina 10.15.4. The Xcode 11.5
release supports on-device debugging for iOS 8 and later, tvOS 9 and later, and
watchOS 2 and later. Xcode 11.5 requires a Mac running macOS Catalina 10.15.2 or
later.

### Apple Clang Compiler

#### Resolved Issues

- Fixed an issue with incorrect code generation when targeting armv7 devices.
  (61901594)

### Asset Catalog

#### Known Issues

- watchOS and tvOS apps with asset catalogs built with Xcode 11.4 or later may
  experience slower image-loading performance on devices running on watchOS 6.1
  or earlier, or when in Dark Mode on tvOS 13.3 or earlier. (62328605
  
  **Workaround**: Add a symbol glyph to the app’s asset catalog.

#### Resolved Issues

- Restored image-loading performance for apps in Dark Mode on devices running iOS
  13.3 or earlier. (61200701) (FB7648891)

### Debugging

#### Resolved Issues

- Symbol names are no longer printed in stack frames in the console by default,
  as this combination can result in deadlocks when running Thread Sanitizer on
  simulated devices.
  
  For schemes that don’t have the option to gather code coverage enabled, you
  can re-enable symbol names and source locations by adding a `TSAN_OPTIONS`
  environment variable with the value `symbolize=1` in the scheme editor.
  (61840387)

### Interface Builder

#### Resolved Issues

- Fixed a crash that could occur with connect-to-source when Control-dragging an
  object over a class with an `@end` keyword that shares a line with the previous
  item. (61957256)

### Localization

#### Resolved Issues

- `genstrings` continues to look for additional instances of a localization
  token, such as “Text”, after finding it as part of an identifier. (61903372)
- When performing string extraction, `genstrings` only interprets SwiftUI
  constructs within Swift files. (60440513, 61903448)

### Playgrounds

#### Resolved Issues

- Restored disclosure triangles for revealing the contents of playground books
  in Xcode’s project navigator. (61902475)

### Signing and Distribution

#### Known Issues

- In a Mac app or an app built with Mac Catalyst, Xcode sometimes does not
  require a provisioning profile or include the Game Center entitlement. As a
  result, your app may fail to communicate with Game Center services at runtime.
  (62903631)
  
  **Workaround**: Add the following entitlement to your app’s entitlements plist:
  
  ```text
  <key>com.apple.developer.game-center</key>
  <true/>
  ```

#### Resolved Issues

- Fixed an issue that prevented automatic signing from making changes if the app
  IDs used a seed prefix and not a team ID prefix. (59672760) (FB7593038)

### Simulator

#### Resolved Issues

- Fixed some issues where Xcode would sometimes fail to run an app in a
  simulated device, with an error “Timed out waiting for Simulator.app to become
  ready”. (57050823, 62542482) (FB7437899)
- Fixed a crash that could occur when invoking Siri in a simulated device.
  (62333338)

### Swift

#### Resolved Issues

- Fixed a crash that could occur when using an opaque result type whose
  underlying type was not public. (60951353, 61902210) (FB7641416)
- Fixed a crash that occurred when declaring a property with an attached
  property wrapper that had the same name as another property in the same scope.
  (61902377)

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