Show us screen captures of both Lightroom and your operating system so we can see what you are seeing.
Hi, I'm having this same issue. When I go to locate the original file so Lightroom can "see" it, it's gone. Perhaps because the original was on an SD card that I since cleared and re-filled? I can see the image, so I know there has to be some way to save it - these are from a trip we took to the San Juan Islands, and I can't imagine we'll be going back.
The file is clearly not in the location Lightroom thinks it should be in.
I don't understand this:
When I go to locate the original file so Lightroom can "see" it, it's gone.
How are you trying to locate the original file? Tell me the exact step-by-step method you used to try to locate the original file. What do you mean "it's gone"?? Define "gone". Gone from where? Are you seeing that it is "gone" in Lightroom, or in your operating system, or somewhere else?
If the files were somehow on an SD card and imported into LR using ADD, then unless you have a backup, your files have been erased and cannot be recovered.
I agree with Paige.
Your Finder screen-clip shows you are looking at files ON THE CAMERA CARD.
Do NOT format this card in camera or you will lose your photos.!!
You must have the photos in the HARD-DRIVE location that Lightroom believes them to be.
The images you see in Lightroom are only 'previews', and they all show the 'missing' icon.