I have been tasked with figuring out a way to programmatically modify existing IPTC metadata in sets of photos on local Mac OSX machines in preparation for use in a web slideshow tool. We have Photo Mechanic licenses (v4.6.7) and a variety of machines (all Macs) but the person who wants this is running OSX 10.5.8. If we can get it working on his machine, we can deploy the solution to everyone else easily enough.
The easiest approach we've thought of is to write a saved regular expression. We've found the "Find and Replace..." dialog but none of the documentation we've found indicates that it supports regexes. If it does support regexes, what format does it accept/require? I'm asking since every regex implementation I've ever run across seems to do things differently. If it doesn't support regex replacements, do you have any alternate recommendations?