I am using version 5 of Photo Mechanic (try version) latest build on my Intel Based Macbook Pro running Yosemite. 10.10.  I discovered Photo Mechanic after I had already imported photos into Lightroom (Version 6 CC). I have gone into Photo Mechanic and opened the folder were lightroom has stored the files (.dng's) and culled 1800 or so down to 600.  When I try to drag and drop the 600 on to the lightroom icon, it fires the import screen but reports that all photos are there....  That makes sense, but what I need is for the metadata (containing the selections) to be overlaid on to the Lightroom catalog.  Is there any way to do this?  I prefer not to have to delete the pictures from the LR catalog and start again if possible.
Chris Sigmon
LifeSong Visual Arts, LLC,
PS.. I intend to purchase Photo Mechanic, and I will modify my workflow in the future to put PM at the first step.