I am running Photo Mechanic version 4.6.5 and I run Mac OS X 10.5.8 on my Intel-based Mac.
This is only a minor bug but one to be aware of.
When doing a Move Photos, with delete files on, and the target directory is preset to a volume that is not presently mounted, PM appears to perform the move then deletes the files, despite not moving them to a mounted volume, thus loosing the files.
cj