Does anyone know of a Exif viewer for DNG data that will work with Mac X. I have been looking and can't find such a thing.
Give this a try-
exiftool from http://www.sno.phy.queensu.ca/~phil/exiftool/ is what I use.
It's a command line app and perl library. But, if by 'X' you meant X Windows, I don't know what's available.
This did just what I was interested in.
Retrieving data ...