Solution Found: ENABLE_DEBUG_DYLIB Setting Resolves Debugging Issues in Xcode 16.2 with iOS 18.5​ The root cause has been identified: The linker error (Undefined symbols for architecture arm64) and debugging failures occurred because ENABLE_DEBUG_DYLIB was set to NO in the project build settings. Changing this to YES successfully enables proper debugging in Xcode 16.2 with iOS 18.5 on physical devices. @kyleruan @DTS Engineer

FB Number FB19280642 FB17793936 @DTS Engineer

I had the same problem. How did it end