I've had no problem importing photos to Lightroom from anywhere else on my HD, but I can't seem to get to the photos I have in the Apple OEM program "Photos".
How do I get to those?
Please have a look at this article How to transfer photos from iPhoto or Aperture to Photoshop Lightroom (Mac OS) and let us know if that helps. Here's a similar discussion: - how to move files from Apple Photos to Lightroom 6
Retrieving data ...