Scenario: SD memory card was connected to iMac (yosemite). Images/videos (~800) were imported to the Photos App. Afterwards, the sd card was ejected and then wiped. Issue: I went back to check on the 800 or so images and videos and they are not in the Photos App. However, pictures and videos from another a previous and later imports are showing up. I checked the package contents of the Photos App. I checked the masters folder and I found the folders with the date I imported them on. However, all the folders are empty besides thumbnails of the actual pictures. Where did my pictures go?! I tried doing a repair on the photos app (command + option key) but that did restore the pictures. Please help!! Any solutions are welcome. I am stressing over losing these pictures.