I have a Mac BookPro andWhen i look around my arm turns black on one side

When i look around my arm turns black on one side, only noticed on mac so far...

What I expected to happen was...:
it wouldn't do that.

What actually happened was...:
it did that.

Steps to Reproduce:
1. you must face: North: (Towards negative Z) (150.3 / -1.1)
South: (Towards positive Z) (-32.8 / -1.8)
East : (Towards positive X) (-124.8 / -2.0)
West: (Towards negative X) (59.1 / -1.1)