We have an Mac app, which worked fine on 10.14 and 10.15. Howerver when user upgrade to Big sur, we get a lot about crash log. Such as below, it seems not crash on our Application. Thread 2 Crashed:: Dispatch queue: com.apple.root.user-interactive-qos 0 libsystem_platform.dylib 0x00007fff204a3673 os_unfair_lock_lock + 10 1 com.apple.AppKit 0x00007fff22f5c83e -[NSScreenDisplayLink _fire] + 46 2 com.apple.AppKit 0x00007fff236ea2cd ___NSRunLoopTimerCreateWithHandler_block_invoke + 34 3 com.apple.CoreFoundation 0x00007fff2057290d CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION + 20 4 com.apple.CoreFoundation 0x00007fff205723e8 __CFRunLoopDoTimer + 922 5 com.apple.CoreFoundation 0x00007fff20571f42 __CFRunLoopDoTimers + 307 6 com.apple.CoreFoundation 0x00007fff2055857f __CFRunLoopRun + 2008 7 com.apple.CoreFoundation 0x00007fff205576ce CFRunLoopRunSpecific + 563 8 com.apple.Foundation 0x00007fff212e4fa1 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 212 9 com.apple.AppKit 0x00007fff22ffa49c -[NSAnimation(NSInternal) _runBlocking] + 453 10 com.apple.AppKit 0x00007fff22ffa25a __42-[NSAnimation(NSInternal) _runInNewThread]_block_invoke + 97 11 libdispatch.dylib 0x00007fff202b55dd _dispatch_call_block_and_release + 12 12 libdispatch.dylib 0x00007fff202b67c7 _dispatch_client_callout + 8 13 libdispatch.dylib 0x00007fff202c59b5 _dispatch_root_queue_drain + 676 14 libdispatch.dylib 0x00007fff202c5fb8 _dispatch_worker_thread2 + 92 15 libsystem_pthread.dylib 0x00007fff2045e453 _pthread_wqthread + 244 16 libsystem_pthread.dylib 0x00007fff2045d467 start_wqthread + 15 I only reproduce from Xcode once, as show Below, anyone who know how to solve this problem.

I get many crash logs from my mac app as below: Application Specific Information: assertion failure: "(self)-_enumeratingSubviewsCount ((1 6) - 1)" - %lld I know literal meaning when a super view have subviews more than 2 to the 6th power, which is 128. However, when I make a test app, which addSuviews to 200. But it doesn't crash. The test demo code show below    for (int i = 0; i 200; i++) {     NSView *view = [[NSView alloc] initWithFrame:NSMakeRect(0, 0, 20, 20)];     [self.window.contentView addSubview:view];   } Anybody know how to fix this problem. Thanks.

I just run a very simple NSAppleScript： "do shell script \"echo command\" with administrator privileges" However， I got error as below： NSAppleScriptErrorNumber = "-2147450879"; But it works fine on my friend‘s mac, anybody know how to solve this problem.

My app get crash as belows, how can I find the reason: Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 0 com.apple.CoreFoundation 0x00007fff21a965bd CFXNotificationRegistrarRemoveObservers + 41 1 com.apple.CoreFoundation 0x00007fff21a9639d CFXNotificationRegistrarRemoveNames + 306 2 com.apple.CoreFoundation 0x00007fff21a9622b CFXNotificationRegistrarRemove + 361 3 com.apple.CoreFoundation 0x00007fff2198d3a3 CFXNotificationRemoveObservers + 113 4 com.apple.Foundation 0x00007fff22611a0b -[NSNotificationCenter removeObserver:name:object:] + 257 5 com.apple.UIFoundation 0x00007fff252295b7 -[NSLayoutManager dealloc] + 163 6 com.apple.CoreFoundation 0x00007fff2192d191 RELEASEOBJECTSINTHEARRAY + 118 7 com.apple.CoreFoundation 0x00007fff2192d0d4 -[NSArrayM dealloc] + 279 8 com.apple.UIFoundation 0x00007fff252511cc -[NSTextStorage dealloc] + 102 9 com.apple.UIFoundation 0x00007fff252de9cf -[NSStringDrawingTextStorage dealloc] + 93 10 libobjc.A.dylib 0x00007fff2187a39d AutoreleasePoolPage::releaseUntil(objcobject**) + 167 11 libobjc.A.dylib 0x00007fff2185d31e objcautoreleasePoolPop + 161 12 com.apple.Foundation 0x00007fff2264de46 withUnlockedObservers + 576 13 com.apple.Foundation 0x00007fff2264dbd9 -[NSObserverList receiveBox:] + 89 14 com.apple.Foundation 0x00007fff2264db6a 68-[NSObject(DefaultObservationImplementations) receiveObservedValue:]blockinvoke + 53 15 com.apple.Foundation 0x00007fff2264da8e -[NSObject(DefaultObservationImplementations) receiveObservedValue:] + 156 16 com.apple.CoreAutoLayout 0x00007fff2aaf2c78 -[NSISVariableObservable emitValueIfNeeded] + 290 17 com.apple.CoreAutoLayout 0x00007fff2aaf6ff2 -[NSISEngine performPendingChangeNotifications] + 232 18 com.apple.AppKit 0x00007fff24449b9a -[NSView updateConstraintsForSubtreeIfNeeded] + 65 19 com.apple.CoreAutoLayout 0x00007fff2aafc67a -[NSISEngine withBehaviors:performModifications:] + 84 20 com.apple.AppKit 0x00007fff243b8846 -[NSView(NSConstraintBasedLayout) withAutomaticEngineOptimizationDisabled:] + 59 21 com.apple.AppKit 0x00007fff24dd8f5c -[NSTouchBarItem itemViewMinSize:maxSize:preferredSize:stretchesContent:] + 824 22 com.apple.AppKit 0x00007fff2487e54d _51-[NSTouchBarItemContainerView updateMeasuredSizes]blockinvoke + 316 23 com.apple.CoreAutoLayout 0x00007fff2aafc67a -[NSISEngine withBehaviors:performModifications:] + 84 24 com.apple.AppKit 0x00007fff2487e3b2 -[NSTouchBarItemContainerView updateMeasuredSizes] + 120 25 com.apple.AppKit 0x00007fff2487e28f -[NSTouchBarItemContainerView minSize] + 63 26 com.apple.AppKit 0x00007fff244b4fc1 -[NSTouchBarLayout aggregateWidthOfItems:sharesLeftEdge:sharesRightEdge:widthMeasurement:] + 233 27 com.apple.AppKit 0x00007fff244b54b6 -[NSTouchBarLayout attributesOfItems:centerItems:givenSize:sharesLeftEdge:sharesRightEdge:xOrigin:] + 470 28 com.apple.AppKit 0x00007fff244b4689 -[NSTouchBarLayout attributesOfItems:centerItems:givenSize:] + 833 29 com.apple.AppKit 0x00007fff24d90174 -[NSTouchBarView positionSubviews] + 214 30 com.apple.AppKit 0x00007fff24d90097 -[NSTouchBarView layout] + 87 31 com.apple.AppKit 0x00007fff243fa251 NSViewLayout + 605 32 com.apple.AppKit 0x00007fff243f9ced -[NSView layoutSubtreeWithOldSize:] + 392 33 com.apple.AppKit 0x00007fff24d8fff5 -[NSTouchBarView layoutSubtreeWithOldSize:] + 71 34 com.apple.AppKit 0x00007fff243f9e4c -[NSView layoutSubtreeWithOldSize:] + 743 35 com.apple.AppKit 0x00007fff243f9e4c -[NSView layoutSubtreeWithOldSize:] + 743 36 com.apple.AppKit 0x00007fff243f9e4c -[NSView layoutSubtreeWithOldSize:] + 743 37 com.apple.AppKit 0x00007fff243f919d -[NSView layoutSubtreeIfNeededAndAllowTemporaryEngine:] + 1041 38 com.apple.AppKit 0x00007fff243f8c9f -[NSWindow(NSConstraintBasedLayout) layoutViewTree] + 148 39 com.apple.AppKit 0x00007fff243f5523 -[NSWindow oldPlaceWindow:fromServer:] + 648 40 com.apple.AppKit 0x00007fff243f3df1 -[NSWindow setFrameCommon:display:fromServer:] + 2875 41 com.apple.AppKit 0x00007fff245ec373 -[NSWindow(NSConstraintBasedLayout) fromConstraintsSetWindowFrame:] + 168 42 com.apple.AppKit 0x00007fff24476610 -[NSWindow(NSConstraintBasedLayout) changeWindowFrameFromConstraintsIfNecessary] + 584 43 com.apple.CoreAutoLayout 0x00007fff2aafc67a -[NSISEngine withBehaviors:performModifications:] + 84 44 com.apple.AppKit 0x00007fff24476366 -[NSWindow(NSConstraintBasedLayout) layoutIfNeeded] + 206 45 com.apple.AppKit 0x00007fff244761d0 _NSWindowGetDisplayCycleObserverForLayoutblockinvoke + 430 46 com.apple.AppKit 0x00007fff24475446 NSDisplayCycleObserverInvoke + 155 47 com.apple.AppKit 0x00007fff24474fd0 NSDisplayCycleFlush + 937 48 com.apple.QuartzCore 0x00007fff274701ee CA::Transaction::runcommithandlers(CATransactionPhase) + 92 49 com.apple.QuartzCore 0x00007fff2746efa4 CA::Transaction::commit() + 382 50 com.apple.AppKit 0x00007fff24c641fe 62+[CATransaction(NSCATransaction) NSstartFrameWithDisplayLink]blockinvoke + 285 51 com.apple.AppKit 0x00007fff24c645af __NSRunLoopObserverCreateWithHandlerblockinvoke + 41 52 com.apple.CoreFoundation 0x00007fff2198b85d CFRUNLOOPISCALLINGOUTTOANOBSERVERCALLBACKFUNCTION + 23 53 com.apple.CoreFoundation 0x00007fff2198b6ed CFRunLoopDoObservers + 549 54 com.apple.CoreFoundation 0x00007fff2198ab9d CFRunLoopRun + 838 55 com.apple.CoreFoundation 0x00007fff2198a16e CFRunLoopRunSpecific + 563 56 com.apple.HIToolbox 0x00007fff2a6802e0 RunCurrentEventLoopInMode + 292 57 com.apple.HIToolbox 0x00007fff2a67ff32 ReceiveNextEventCommon + 283 58 com.apple.HIToolbox 0x00007fff2a67fdff BlockUntilNextEventMatchingListInModeWithFilter + 64 59 com.apple.AppKit 0x00007fff2439f809 DPSNextEvent + 879 60 com.apple.AppKit 0x00007fff2439e035 -[NSApplication(NSEvent) nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 1352 61 com.apple.AppKit 0x00007fff24390628 -[NSApplication run] + 586 62 com.myApp.XXXX 0x0000000100ea79b9 main + 4889 63 libdyld.dylib 0x00007fff21769951 start + 1

I am a MacOS Developer. I had finished codesgin and notarize my app. When I enter the check cmd: spctl -a -v my.app Then I can get the result: my.app: accepted source=Notarized Developer ID We want to make a background update program, it will download a new Contents.zip file, and replace the old file Contents in my.app. Finish the above progress Then I enter the spctl -a -v my.app ; get the result: cannot find code object on diskDoes this is a problem? If it is, How can I solve this. Thanks a lot.However, when I enter: stapler validate my.app, the result is :The validate action worked!