Lexar CF card reader unrecognized by Mac
I am trying to extract photos from Lexar CF cards that I used with a Nikon Coolpix 990 years ago. I have a Lexar card reader that connects via USB-A. I have tried the reader with both my MacBookPro 2018 running Sequoia and my MacBookPro 2012 running Catalina. When attached, the light on the card reader lights up normally but the reader is not recognized by either OS. The cards themselves record and write in the camera.
Is this salvageable...do I need different card readers, drivers, etc. or is this camera just another paperweight?
Thanks.
Earlier Mac models