Thanks for your reply and suggestion. Just as you said, I copied a RAW file from an SD Card to my desktop. The thumbnail for that file is in Black and White. Opening that file in Preview shows a color image. What I see immediately after importing RAW files into Photos, all the images appear first in color. Then it appears they are processed somehow and turn to Black and White, as if Photos applies some processing to the RAW File in order to display the images in Black and White. This doesn’t happen to every file, some remain as the color version. I thought I understood all about RAW files. Oh, one other thing… I noticed that when I look at these RAW files in Nitro, they are displayed in Black and White, if they are displayed as Black and White in Photos. When I go to edit these files, the RAW file displayed is in color as soon as I hit the edit button. I just want to be sure things are working as they should.
Thank you for your patience.
Ed