Phil, It's my understanding that ExifTool does not read/write IPTC data stored in the RSRC fork of images on MacOSX? I use iView MediaPro for my DAM and it writes IPTC data to the RSRC fork for RAW files e.g. CR2. Any chance this functionality could be added - maybe via a switch to indicate using the RSRC fork instead of the data fork? Thanks, Mark