Code review: 323200043: Renamed MacOSX to macOS.
Code review: 323200043: Renamed MacOSX to macOS.

rgayon/l2tdevtools,rgayon/l2tdevtools,joachimmetz/l2tdevtools,joachimmetz/l2tdevtools,log2timeline/l2tdevtools,log2timeline/l2tdevtools,Onager/l2tdevtools,Onager/l2tdevtools