Hey DRP STUDIO 88,
This could be cause by a few different things, but to clarify this is a Mac project packaged for Mac alone and not for a mobile iOS project, correct?
This honestly looks like a Post Processing ‘Auto-Exposure’ issue since your image appears washed out. You mention however, you set your Directional Light to Movable, after baking the lighting, which is going to discard the lightmap and shadowmap information. Stationary Directional Lights still support dynamic shadows and lighting.
Have a quick read through the documentation on Stationary Lights to see if you find information in there beneficial for your particular issue.
Stationary Lights
Let me know if you have further questions, or need additional assistance.
Cheers,