AtmosphericFog does not work on Mac OS X. Unreal 4.6.1

Retina (July 12)
Processor: 2.6 GHz Intel Core i7
Memory: 8 GB 1600 MHz DDR3
Graphics: NVIDIA GeForce GT 650M 1024 MB
Mac OS X 10.9.5
Second monitor.

Unreal Engine 4.6.1
Blank Blueprint project.

I did simple initial project (some example from tutorial). I added AtmosphericFog and got black-red background.

There was a bug in Atmospheric Fog on OS X and that has been fixed for 4.7.