when I download JPEGS it stores the pictures behind much older photos
When I download photos onto my iMac, it shows the download as a much older photograph - downloaded years ago, but when I click on the old photo the new download is behind it. How can I stop this from happening? It happened on my MacBook Pro, which had to eventually be sent back to Apple for repair. It seems to be happening when I download Raw and Jpegs together. Raw files seem to be okay. Any ideas how I can rectify this at home. I've tried the iPhoto's repair and reloaded Mojave, but no luck so far. Many thanks.
iMac Line (2012 and Later)