Wanted to test Photo Mechanic 6 on a Mac with High Sierra. Unfortunately no preview window appears. Not with double click and not with cmd+R. Any idea?
When you put your mouse cursor over the thumbnail for the item, does a button with a magnifying glass appear over it? If not, then that image has no preview. What kind of images are you trying to view?
What build of Photo Mechanic 6 are you using?
-Kirk