This is a longstanding but low frequency Mac crash.
User Descriptions
Callstack from Log
[2017.11.09-19.23.22:392][ 63]LogMaterial: Missing cached shader map for material FMatExpressionPreview MaterialExpressionVectorParameter_0, compiling. [2017.11.09-19.23.22:402][ 63]LogSlate: Took 0.000460 seconds to synchronously load lazily loaded font '../../../Engine/Content/Editor/Slate/Fonts/Roboto-BoldCondensed.ttf' (158K) [2017.11.09-19.23.22:739][ 64]LogSlate: Took 0.002179 seconds to synchronously load lazily loaded font '../../../Engine/Content/Editor/Slate/Fonts/Roboto-Italic.ttf' (157K) [2017.11.09-19.23.23:652][ 83]MaterialEditorStats: Texture samplers: 2/16 [2017.11.09-19.23.25:957][156]LogMaterial: Missing cached shader map for material Wings, compiling. [2017.11.09-19.23.29:404][282]MaterialEditorStats: Texture samplers: 2/16 [2017.11.09-19.23.30:431][329]LogMac: === Critical error: === SIGSEGV: invalid attempt to access memory at address 0x20 [2017.11.09-19.23.30:431][329]LogMac: 0xbea68f31 libobjc.A.dylib!objc_retain() [UnknownFile]) 0xa9b5c6c5 CoreFoundation!+[__NSDictionaryI __new:::::] [UnknownFile]) 0xa9b5c390 CoreFoundation!-[__NSPlaceholderDictionary initWithObjects:forKeys:count:] [UnknownFile]) 0xa785b2c1 AppKit!-[NSWindow _copyPublicPersistentUIInfo] [UnknownFile]) 0xa7858f5f AppKit!recursivelyEncodeInvalidPersistentState() [UnknownFile]) 0xa78576c3 AppKit!-[NSPersistentUIManager flushAllChangesOptionallyWaitingUntilDone:updatingSnapshots:] [UnknownFile]) 0xa785716f AppKit!-[NSPersistentUIManager flushPersistentStateAndClose:waitingUntilDone:] [UnknownFile]) 0xa7857051 AppKit!__42-[NSPersistentUIManager acquireDirtyState]_block_invoke [UnknownFile]) 0xbf3278fc libdispatch.dylib!_dispatch_client_callout() [UnknownFile]) 0xbf33ca16 libdispatch.dylib!_dispatch_continuation_pop() [UnknownFile]) 0xbf332a6c libdispatch.dylib!_dispatch_source_latch_and_call() [UnknownFile]) 0xbf32a13b libdispatch.dylib!_dispatch_source_invoke() [UnknownFile]) 0xbf334908 libdispatch.dylib!_dispatch_main_queue_callback_4CF() [UnknownFile]) 0xa9c14bc9 CoreFoundation!__CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__() [UnknownFile]) 0xa9bd5c0d CoreFoundation!__CFRunLoopRun() [UnknownFile]) 0xa9bd5114 CoreFoundation!CFRunLoopRunSpecific() [UnknownFile]) 0xa9135ebc HIToolbox!RunCurrentEventLoopInMode() [UnknownFile]) 0xa9135cf1 HIToolbox!ReceiveNextEventCommon() [UnknownFile]) 0xa9135b26 HIToolbox!_BlockUntilNextEventMatchingListInModeWithFilter() [UnknownFile]) 0xa76cea54 AppKit!_DPSNextEvent() [UnknownFile]) 0xa7e4a7ee AppKit!-[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] [UnknownFile]) 0xa76c33db AppKit!-[NSApplication run] [UnknownFile]) 0x0460fedf UE4Editor!tchar_main(int, wchar_t**) [UnknownFile]) 0x0460f7a9 UE4Editor!main() [UnknownFile]) 0xbf35d235 libdyld.dylib!start() [UnknownFile])
repro steps currently unknown
libobjc.A.dylib!Unknown() CoreFoundation!Unknown() CoreFoundation!Unknown() AppKit!<Unknown> AppKit!<Unknown> AppKit!<Unknown> AppKit!<Unknown> AppKit!<Unknown> libdispatch.dylib!<Unknown> libdispatch.dylib!<Unknown> libdispatch.dylib!<Unknown> libdispatch.dylib!<Unknown> libdispatch.dylib!<Unknown> CoreFoundation!Unknown() CoreFoundation!Unknown() CoreFoundation!Unknown() HIToolbox!<Unknown> HIToolbox!<Unknown> HIToolbox!<Unknown> AppKit!<Unknown> AppKit!-[NSApplication() AppKit!<Unknown> UE4Editor!tchar_main() UE4Editor!<Unknown> libdyld.dylib!<Unknown>
How do I set a material as a post-processing material?
UMG RichText not appear image when packaged
How does TextureRenderTarget2D get TArray<uint8> type data?
Why does the REMOVE method of map container remove elements have memory leaks?
How to delete some elements correctly when deleting an array loop?
What is the difference between Camera and CineCamera?
How to convert the datasmith scene file to BluePrint. Create animations in BluePrint.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-52294 in the post.