Linker Error: Undefined symbols for architecture x86_64 while packaging

Development Programming & Scripting C++
3

I’m having the same issue:

UATHelper: Packaging (Mac): Undefined symbols for architecture x86_64:
UATHelper: Packaging (Mac): “OBJC_CLASS$_MTLCaptureManager”, referenced from:
UATHelper: Packaging (Mac): objc-class-ref in UE4-MetalRHI.a(Module.MetalRHI.cpp.o)
UATHelper: Packaging (Mac): ld: symbol(s) not found for architecture x86_64

MacOS Sierra 10.12.6 XCode 8.3.3 & UE4 4.18.1