Profile GPU Command Crashes Standalone Game on Mac

[Link Removed]

"ProfileGPU" Command Crashes Standalone Game on Mac but not on a Windows PC.

Regression: No

1. Open any UE4.15 Project on a Mac
2. PIE (Stand alone game)
3. type ~ to bring up command prompt
4. enter command "ProfileGPU"
   RESULT: Standalone game crashes
   EXPECTED: GPU profiler window to open as it does on a Windows PC

UE4Editor-RHI.dylib!FGPUProfiler::PushEvent()
UE4Editor-MetalRHI.dylib!FMetalRHICommandContext::RHIPushEvent()
UE4Editor-RHI.dylib!FRHICommandListExecutor::ExecuteInner_DoExecute()
UE4Editor-RHI.dylib!FRHICommandListExecutor::ExecuteInner()
UE4Editor-RHI.dylib!FRHICommandListExecutor::ExecuteList()
UE4Editor-RHI.dylib!FRHICommandListBase::~FRHICommandListBase()
UE4Editor-RHI.dylib!FParallelTranslateCommandList::DoTask()
UE4Editor-RHI.dylib!TGraphTask<FParallelTranslateCommandList>::ExecuteTask()
UE4Editor-Core.dylib!FTaskThreadAnyThread::ProcessTasks()
UE4Editor-Core.dylib!FTaskThreadAnyThread::ProcessTasksUntilQuit()
UE4Editor-Core.dylib!FTaskThreadBase::Run()
UE4Editor-Core.dylib!FRunnableThreadPThread::Run()
UE4Editor-Core.dylib!FRunnableThreadPThread::_ThreadProc()
libsystem_pthread.dylib!<Unknown>
libsystem_pthread.dylib!<Unknown>
libsystem_pthread.dylib!<Unknown>