I'm just about to give up on facial recognition. It either doesn't work or is so non-intuitive it isn't useful. I have run it on a folder of 300 images most of which are clearly portraits. It recognized about 80 percent of them. The problem is the unnamed panel, as shown in the help files, does not show up when in facial recognition workspace. There seems to be no way to add the un-named portraits to the correct group.
It seems quicker just to give the names a keyword and do it all manually in the grid view, which is what I'll revert to until this is fixed.
MacPro OS 10.11.6 LR cc