I used to use an older version of the stand alone Abbyy Fine Reader for Mac with a great script from a user on the forum with very good results. Since I upgraded to an M1 Mac and the latest version of FineReader, which is no longer scriptable, I just use the Abbyy OCR engine in DT for the convenience.
Here is a link to the other post with the details: Script to OCR PDFs with the latest FineReader - #16 by sawxray