I'm going to modify this statement. My older Raf photos still cannot be viewed in Finder; but photos I just uploaded can be viewed. They are uncompressed raw (Raf) files and as stated by 30West, the MACOS does read them. I can only conclude that my older files were compressed. I will investigate further if the software I downloaded is any help. BTW, the link he provided doesn't work.
Update: So here's what happened. I downloaded the software and opened it, giving it permission to view my photos. I opened the folder with the older Raf files and I could see them in the software. Then I went to Finder and I still could not see them there, but I could see the files that I imported as DNGs. Further investigation is needed.
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