Could not find offline 'metal' shader compiler

I upgraded my project to UE4.12
When I package it I have this repeating error message, during the cooking process :

MainFrameActions: Packaging (Mac): UE4Editor: LogMetalShaderCompiler:Warning: Could not find offline ‘metal’ shader compiler - falling back to slower online compiled text shaders.

How can I solve that? Thanks

Hey Panelsofsilence,

This error message typically comes from not having XCode installed. Go ahead and install XCode and see if this resolves your error.

Have a great day!

Looks like it worked!
Thanks!