It seems like in Lightroom CC on MacOS, it will only download the file in the Photos app that the Photos app already has downloaded. On iOS, Lightroom seems to still download the RAW file along with JPG despite it being on iCloud. Photos app or Lightroom CC app issue? I think Adobe should get in contact with Apple regarding this to provide a more consistent experience between iOS and MacOS. I tend to start many projects on my iPad and finish on my iMac, but sometimes I need just one more photo to import, and this forces me to go to my iPad to add it to the Lightroom Library to get the RAW file unless I reimport it as a local file to my iMac.