Hello! In our App we found out the сrash at QuickLook after users updated their iPhones up to iOS 18. Crash report: SIGABRT 0x0000000000000000 Crashed: Thread 0 libsystem_kernel.dylib __abort_with_payload + 8 1 libsystem_kernel.dylib abort_with_payload_wrapper_internal + 104 2 libsystem_kernel.dylib abort_with_payload_wrapper_internal + 0 3 libobjc.A.dylib _objc_fatalv(unsigned long long, unsigned long long, char const*, char*) + 116 4 libobjc.A.dylib _objc_fatalv(unsigned long long, unsigned long long, char const*, char*) + 0 5 libobjc.A.dylib weak_register_no_lock + 396 6 libobjc.A.dylib objc_initWeak + 440 7 UIKitCore -[UIViewController viewDidMoveToWindow:shouldAppearOrDisappear:] + 1412 8 UIKitCore -[_UIRemoteViewController viewDidMoveToWindow:shouldAppearOrDisappear:] + 396 9 UIKitCore -[UIView(Internal) _didMoveFromWindow:toWindow:] + 1180 10 UIKitCore -[_UISizeTrackingView _didMoveFromWindow:toWindow:] + 112 11 UIKitCore -[UIView(Internal) _didMoveFromWindow:toWindow:] + 712 12 UIKitCore __45-[UIView(Hierarchy) _postMovedFromSuperview:]_block_invoke + 128 13 CoreAutoLayout -[NSISEngine withBehaviors:performModifications:] + 84 14 UIKitCore -[UIView _postMovedFromSuperview:] + 512 15 UIKitCore __UIViewWasRemovedFromSuperview + 136 16 UIKitCore -[UIView(Hierarchy) removeFromSuperview] + 248 17 QuickLook -[QLToolbarController setAccessoryView:animated:] + 576 18 QuickLook __55-[QLPreviewController _presentLoadedPreviewCollection:]_block_invoke + 120 19 QuickLookUICore QLRunInMainThread + 60 20 QuickLook -[QLPreviewController _presentLoadedPreviewCollection:] + 116 21 QuickLook __48-[QLPreviewController _presentPreviewCollection]_block_invoke_2 + 68 22 QuickLook (Missing) 23 libswift_Concurrency.dylib swift::runJobInEstablishedExecutorContext(swift::Job*) + 252 After research, we found out that a crash occurs in QuickLook when a user tries to open a file with unknown mimeType - application/octet-stream. QuickLook convert that files to known type (for an example - application/pdf), but crashes for the first opening the file. Any help would be greatly appreciated!