Apps built with Xcode 13 or Xcode 13.1 that make use of Swift Concurrency features (such as async/await), deploy to iOS prior to 15, tvOS prior to 15, or watchOS prior to 8, and have bitcode enabled may crash at launch with an error reporting that the libswift_Concurrency.dylib library was not loaded. (86349088)
Workaround:Add -Wl , -weak-lswift_Concurrency-Wl , -rpath , /usr/lib/swift to Other Linker Flags in the app’s build settings.
The build system and Swift compiler have a new mode that better utilizes available cores, resulting in faster builds for Swift projects. The mode is opt-in, and you can enable it globally with the following user default:
defaults write com.apple.dt.XCBuild EnableSwiftBuildSystemIntegration 1
Please report any issues with the new build system mode through Feedback Assistant. (84467780)
You can now use Swift Concurrency in applications that deploy to macOS Catalina 10.15, iOS 13, tvOS 13, and watchOS 6 or newer. This support includes async/await, actors, global actors, structured concurrency, and the task APIs. (70738378)
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