RC-R, MEB
Thank you both for your replies. What I meant by "marked" is that the context tool bar in Affinity Photo shows the file as RAW or RGB, etc. I was shooting my photos in RAW+JPEG. I guess since Apple Photos displays the JPEG first, whenever I tried to open a file in Affinity Photos, I was getting the JPEG.
I tried MEB's suggestion for loading the RAW file and that worked great. I would prefer to be able to open the RAW files directly from Affinity. So, I guess I'll have to figure a way to separate the RAW from the JPEG before I upload them to Apple Photos. Apple Photos seems a little combersome to me. I'd prefer to avoid Adobe products because I don't like subscriptions. Hopefully Affinity or someone will come out with a file management system.
Again, thank you both for the help