dyld: Symbol not found: _$sSo18OS_dispatch_sourceC8DispatchE19MemoryPressureEventVs23CustomStringConvertibleACMc

Upgraded Xcode from 15.2 to 16. App runs properly on iOS 18 Simulator for Xcode 16 but crashes on iOS 17.5, 17.4 & 17.2 immediately after build successfully.

dyld[60620]: Symbol not found: _$sSo18OS_dispatch_sourceC8DispatchE19MemoryPressureEventVs23CustomStringConvertibleACMc Referenced from: <59369128-9EA5-3CF7-8CCF-7C754D9EE639> /Users/siddheshwarashokkathale/Library/Developer/CoreSimulator/Devices/E18F8D1F-764C-4491-B471-5BBB52A327EF/data/Containers/Bundle/Application/A257613C-3000-41F6-92EF-287E45D3A9D5/Arch.app/Arch.debug.dylib Expected in: <5E0473C0-C3FF-3BFB-9712-1CFB1372EA49> /Library/Developer/CoreSimulator/Volumes/iOS_21F79/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 17.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib/swift/libswiftDispatch.dylib Message from debugger: Terminated due to signal 6

App runs properly on iOS 18 Simulator for Xcode 16 but crashes on iOS 17.5, 17.4 & 17.2

On the simulator? Or on real devices?

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Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

I'm seeing the same thing when building in Xcode16 and running in IOS 17.x simulators

dyld: Symbol not found: _$sSo18OS_dispatch_sourceC8DispatchE19MemoryPressureEventVs23CustomStringConvertibleACMc
 
 
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