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My XCode version is 11.1 and the iPhone OS version is 14.0.1. To run apps on iOS 14 device, it requires XCode 12.

An alternate option to support iOS 14 in XCode 11, is to add Device Support. So I have added Device Support for iOS 14 in the following way -

Goto Applications > Xcode > Right Click > Show Package Contents > Contents > Developer > Platforms > iPhoneOS.platform > DeviceSupport

Then added the device support files in this directory.

Device Support files are available here - https://github.com/filsv/iPhoneOSDeviceSupport

After adding Device support, whenever I try to run it on the iPhone device, it instantly shows a 'Build Successful' message, then XCode crashes.

Here is the build error log -

Process: Xcode [1314] Path: /Applications/Xcode.app/Contents/MacOS/Xcode Identifier: com.apple.dt.Xcode Version: 11.1 (15405) Build Info: IDEFrameworks-15405000000000000~13 App Item ID: 497799835 App External ID: 832925179 Code Type: X86-64 (Native) Parent Process: ??? [1] Responsible: Xcode [1314] User ID: 501 Date/Time: 2021-03-31 20:33:14.126 +0600 OS Version: Mac OS X 10.14.6 (18G95) Report Version: 12 Bridge OS Version: 3.6 (16P6571) Anonymous UUID: 13DE45B0-BCED-AB3D-BEDF-B4704CEFE0C2 Time Awake Since Boot: 630 seconds System Integrity Protection: enabled Crashed Thread: 18 Dispatch queue: Mutex to protect _hasPerformedWorkerAction Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x0000000000000000, 0x0000000000000000 Exception Note: EXC_CORPSE_NOTIFY Application Specific Information: com.apple.main-thread ProductBuildVersion: 11A1027 UNCAUGHT EXCEPTION (NSInternalInconsistencyException): Invalid parameter not satisfying: aString != nil UserInfo: (null) Hints: 0: Calling block provided to DVTSyncPerformBlock() here: 0 DVTSyncPerformBlock (in DVTFoundation) 1 -[IDEExecutionRunnableTracker executionWantsHold:withError:] (in IDEFoundation) 2 -[IDERunOperationWorker _startWithRetrying:] (in IDEFoundation) 3 __44-[IDERunOperationWorker _startWithRetrying:]_block_invoke_3 (in IDEFoundation) 4 __48-[DVTDispatchLock_Recursive performLockedBlock:]_block_invoke (in DVTFoundation) 5 _dispatch_client_callout (in libdispatch.dylib) 6 _dispatch_lane_barrier_sync_invoke_and_complete (in libdispatch.dylib) 7 DVTDispatchBarrierSync (in DVTFoundation) 8 -[DVTDispatchLock performLockedBlock:] (in DVTFoundation) 9 -[DVTDispatchLock_Recursive performLockedBlock:] (in DVTFoundation) 10 __44-[IDERunOperationWorker _startWithRetrying:]_block_invoke_2 (in IDEFoundation) 11 __DVT_CALLING_CLIENT_BLOCK__ (in DVTFoundation) 12 __DVTDispatchAfter_block_invoke (in DVTFoundation) 13 _dispatch_client_callout (in libdispatch.dylib) 14 _dispatch_continuation_pop (in libdispatch.dylib) 15 _dispatch_source_invoke (in libdispatch.dylib) 16 _dispatch_continuation_pop (in libdispatch.dylib) 17 _dispatch_async_redirect_invoke (in libdispatch.dylib) 18 _dispatch_root_queue_drain (in libdispatch.dylib) 19 _dispatch_worker_thread2 (in libdispatch.dylib) 20 _pthread_wqthread (in libsystem_pthread.dylib) 21 start_wqthread (in libsystem_pthread.dylib) Backtrace: 0 __exceptionPreprocess (in CoreFoundation) 1 DVTFailureHintExceptionPreprocessor (in DVTFoundation) 2 objc_exception_throw (in libobjc.A.dylib) 3 +[NSException raise:format:arguments:] (in CoreFoundation) 4 -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] (in Foundation) 5 -[NSCell _objectValue:forString:errorDescription:] (in AppKit) 6 -[NSCell setStringValue:] (in AppKit) 7 -[NSControl setStringValue:] (in AppKit) 8 -[IDEExecutionHoldAlertHelper showAlert] (in IDEKit) 9 -[IDEWorkspaceTabController showExecutionHoldAlertWithError:] (in IDEKit) 10 __55-[IDEWorkspaceDocument _setupLaunchSessionsObservation]_block_invoke_2 (in IDEKit) 11 -[DVTObservingBlockToken observeValueForKeyPath:ofObject:change:context:] (in DVTFoundation) 12 NSKeyValueNotifyObserver (in Foundation) 13 NSKeyValueDidChange (in Foundation) 14 -[NSObject(NSKeyValueObservingPrivate) _changeValueForKeys:count:maybeOldValuesDict:maybeNewValuesDict:usingBlock:] (in Foundation) 15 -[NSObject(NSKeyValueObservingPrivate) _changeValueForKey:key:key:usingBlock:] (in Foundation) 16 _NSSetCharValueAndNotify (in Foundation) 17 -[IDEExecutionTracker _updateWantsHold] (in IDEFoundation) 18 __37-[IDEExecutionTracker addSubtracker:]_block_invoke (in IDEFoundation) 19 -[DVTObservingBlockToken observeValueForKeyPath:ofObject:change:context:] (in DVTFoundation) 20 NSKeyValueNotifyObserver (in Foundation) 21 NSKeyValueDidChange (in Foundation) 22 -[NSObject(NSKeyValueObservingPrivate) _changeValueForKeys:count:maybeOldValuesDict:maybeNewValuesDict:usingBlock:] (in Foundation) 23 -[NSObject(NSKeyValueObservingPrivate) _changeValueForKey:key:key:usingBlock:] (in Foundation) 24 _NSSetCharValueAndNotify (in Foundation) 25 __60-[IDEExecutionRunnableTracker executionWantsHold:withError:]_block_invoke (in IDEFoundation) 26 __DVT_CALLING_CLIENT_BLOCK__ (in DVTFoundation) 27 __DVTSyncPerformBlock_block_invoke.48 (in DVTFoundation) 28 DVTInvokeWithLazyFailureHint (in DVTFoundation) 29 __DVTSyncPerformBlock_block_invoke (in DVTFoundation) 30 __CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK__ (in CoreFoundation) 31 __CFRunLoopDoBlocks (in CoreFoundation) 32 __CFRunLoopRun (in CoreFoundation) 33 CFRunLoopRunSpecific (in CoreFoundation) 34 RunCurrentEventLoopInMode (in HIToolbox) 35 ReceiveNextEventCommon (in HIToolbox) 36 _BlockUntilNextEventMatchingListInModeWithFilter (in HIToolbox) 37 _DPSNextEvent (in AppKit) 38 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] (in AppKit) 39 -[DVTApplication nextEventMatchingMask:untilDate:inMode:dequeue:] (in DVTKit) 40 -[NSApplication run] (in AppKit) 41 NSApplicationMain (in AppKit) 42 main (in Xcode) 43 start (in libdyld.dylib) abort() called Application Specific Signatures: NSInternalInconsistencyException
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  • Why not just do this the right way and use Xcode 12? Commented Apr 4, 2021 at 2:58
  • Hi @matt, Upgrading XCode or Mac OS is not possible due to some security reason. That is why I am trying with existing resources. Commented Apr 5, 2021 at 10:53
  • I have upgraded my iPhone OS to 14.4.2. Now I have been facing another problem when trying to run from Xcode 11, it shows 'Unable to copy symbols from this device'. Commented Apr 5, 2021 at 10:54

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There has been a security enhancement that stops Xcode 11 working with iOS 14 (the probable underlying reason causing the crash) but there is a workaround (and lots of other helpful information) at https://betterprogramming.pub/debugging-on-ios-14-with-xcode-11-d332f12f49dd which explains how to launch, log and debug.

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3 Comments

I've had that kind of problem myself. Try out stackoverflow.com/a/39029595/2715565 to see if it helps.
Thank you for sharing the link. I have tried all of this but doesn't work. I have been facing this problem 'Unable to copy symbols from this device'. Smilar problem github.com/iGhibli/iOS-DeviceSupport/issues/134
One way to narrow it down is to pull off the console logs from the phone. If you can do that and share the console messages at the time of the problem, it could point to where the problem is. Also, is your cable an Apple-manufactured one, and is it directly connected to the computer (no hubs)? It can be glitchy if otherwise.

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