I am running Photo Mechanic Version 6.0, build 6552 (1b31032) on MACOS Monterey.
Lightroom is not recognizing my selected photos from Photo Mechanic but only for images that I was sent through dropbox. The images are full-size high-resolution images from my second shooters. This issue does not happen when selecting images from my own SD cards.
Typically I color code the images I want to select and drag and drop the photos onto the lightroom icon in my dock, which works wonderfully. For some reason, these particular files aren't showing as selected and the import button in lightroom is greyed out. The images transfer to lightroom when I import them manually and are both RAF files and CR3 files.