The clouds were amazing today. I did learn something, though...I have my camera set to store in RAW. I set the control to Monochrome and the viewfinder showed B&W. When I moved to my Mac, the all come over in color. I could easily process in B&W. Didn't know it would save RAW in color. Learn something new every day!
Mine does the same thing. When I did the month of B&W I shot in RAW and jpeg. The jpeg was saved in B&W and RAW in color, unless I processed it in B&W. But since I use Lightroom CC, the color was saved even if I did process it to B&W.