UE4 4.16.1 MacOs Sierra constantly crash

Hi,
My UE4 cant stop crashing. I’ve just began to use it yesterday, and just follow tutorial to learn how to use it, and that crashing everytime.

this the crash report :

LoginId:65b83d9fb74ebe396e11319c78911979
EpicAccountId:fce9fae13bc6416daaf1ba91e891d6d4

SEGV_MAPERR at 0x3

FGenericPlatformMisc::RaiseException(unsigned int) Address = 0x1002a7f1b (filename not found) [in UE4Editor-Core.dylib]
FOutputDeviceMacError::Serialize(wchar_t const*, ELogVerbosity::Type, FName const&) Address = 0x1004a3d7f (filename not found) [in UE4Editor-Core.dylib]
FOutputDevice::Logf(wchar_t const*, …) Address = 0x10058488d (filename not found) [in UE4Editor-Core.dylib]
FDebug::AssertFailed(char const*, char const*, int, wchar_t const*, …) Address = 0x1004eaafe (filename not found) [in UE4Editor-Core.dylib]
__31-[FCocoaTextView selectedRange]_block_invoke Address = 0x100415ebc (filename not found) [in UE4Editor-Core.dylib]
___ZL20PerformBlockOnThreadR19FCocoaRunLoopSourceU13block_pointerFvvEP7NSArrayP8NSStringb_block_invoke Address = 0x1004c7770 (filename not found) [in UE4Editor-Core.dylib]
FCocoaRunLoopSource::Process(__CFString const*) Address = 0x10045f7a4 (filename not found) [in UE4Editor-Core.dylib]
-[FCocoaRunLoopSourceInfo perform] Address = 0x10045f1f6 (filename not found) [in UE4Editor-Core.dylib]
Unknown() Address = 0x7fff9638e321 (filename not found) [in CoreFoundation]
Unknown() Address = 0x7fff9636f21d (filename not found) [in CoreFoundation]
Unknown() Address = 0x7fff9636e716 (filename not found) [in CoreFoundation]
Unknown() Address = 0x7fff9636e114 (filename not found) [in CoreFoundation]
PerformBlockOnThread(FCocoaRunLoopSource&, void () block_pointer, NSArray*, NSString*, bool) Address = 0x10046013a (filename not found) [in UE4Editor-Core.dylib]
bool MainThreadReturn(bool () block_pointer, NSString*) Address = 0x1004b1a03 (filename not found) [in UE4Editor-Core.dylib]
FMacTextInputMethodSystem::DeactivateContext(TSharedRef const&) Address = 0x1004b1d87 (filename not found) [in UE4Editor-Core.dylib]
FSlateEditableTextLayout::HandleFocusLost(FFocusEvent const&) Address = 0x102160886 (filename not found) [in UE4Editor-Slate.dylib]
FSlateApplication::SetUserFocus(FSlateUser*, FWidgetPath const&, EFocusCause) Address = 0x101d99882 (filename not found) [in UE4Editor-Slate.dylib]
FSlateApplication::SetUserFocus(unsigned int, FWidgetPath const&, EFocusCause) Address = 0x101d9ca0f (filename not found) [in UE4Editor-Slate.dylib]
FSlateApplication::RoutePointerDownEvent(FWidgetPath&, FPointerEvent&) Address = 0x101db4fad (filename not found) [in UE4Editor-Slate.dylib]
FSlateApplication::ProcessMouseButtonDownEvent(TSharedPtr const&, FPointerEvent&) Address = 0x101d55a3e (filename not found) [in UE4Editor-Slate.dylib]
FSlateApplication::OnMouseDown(TSharedPtr const&, EMouseButtons::Type, FVector2D) Address = 0x101db36d6 (filename not found) [in UE4Editor-Slate.dylib]
FMacApplication::ProcessMouseDownEvent(FDeferredMacEvent const&, TSharedPtr) Address = 0x1004741f9 (filename not found) [in UE4Editor-Core.dylib]
FMacApplication::ProcessEvent(FDeferredMacEvent const&) Address = 0x10046a72e (filename not found) [in UE4Editor-Core.dylib]
FMacApplication::ProcessDeferredEvents(float) Address = 0x10046858f (filename not found) [in UE4Editor-Core.dylib]
FSlateApplication::TickPlatform(float) Address = 0x101d859db (filename not found) [in UE4Editor-Slate.dylib]
FSlateApplication::Tick(ESlateTickType) Address = 0x101d84e14 (filename not found) [in UE4Editor-Slate.dylib]
FEngineLoop::Tick() Address = 0x1001b580c (filename not found) [in UE4Editor]
GuardedMain(wchar_t const*) Address = 0x1001bbe12 (filename not found) [in UE4Editor]
-[UE4AppDelegate runGameThread:] Address = 0x1001ca01a (filename not found) [in UE4Editor]
-[FCocoaGameThread main] Address = 0x10045fa26 (filename not found) [in UE4Editor-Core.dylib]
Unknown() Address = 0x7fff97d91b3d (filename not found) [in Foundation]
_pthread_body Address = 0x7fffabd0193b (filename not found) [in libsystem_pthread.dylib]
_pthread_body Address = 0x7fffabd01887 (filename not found) [in libsystem_pthread.dylib]
thread_start Address = 0x7fffabd0108d (filename not found) [in libsystem_pthread.dylib]