I'm copying files from my Nikon camera to my iMac several times each week using Nikon Transfer 2 which changes the file name but keeps the uppercase extension.
I spend a lot of time changing 100'ds of files from .NEF to .nef or .JPG to .jpg. I can't do batch processing in Finder so I have to change all the file extensions one by one. Is there any easy way I can do this?