nessViewer (64 bit) & Photos App support
The import of the "Photos App" media in a media show is especially important because the "Photos App" exports media without GPS data: if, for example, a picture with GPS data is dragged & dropped from the "Photos App" on the desktop, then the GPS data is missing. This makes obviously no sense - thus the media show does not support drag & drop from the "Photos App" into a media show drawer.
Once you have imported the media of the "Photos App" in a media show, you can drag & drop the media from the drawer on the desktop (or anywhere else) - with GPS data. Although a small detour, but without data loss.