Hi
Having had the same question and not finding it fully answered, I wanted to add the way to COPY Image Files from within LR Classic on a Mac.
- In Library folders tab, open the folder with the images to copy, select them and click command +S to save all the metadata to the photos on disk.
- Rightclick the folder you want to copy to, and click show in Finder > Finder window will open
- Go back to LR (command +tab (App switcher) select all photos you want to copy and start dragging, so they are hovering "under" your cursor
- While holding the images under your cursor, use command+tab (App switcher) to switch to Finder, and drop them in the desired window. The files will start copying
- Switch back to LR, right click the folder holding the new copys (still shows 0) and choose "sync folder" to have LR registering the copies including their edits/metadata
Once familiar with thsi workflow its very fast.
This works great on Mac OS
Switching Apps while holding files under your cursor also works with hot+corners, or via the App icons in the Dock,
you can freely drag and drop between different Apps these ways.
Hope this helps!
😊