Ask Max: iPhoto 6.0.6
My iphoto 6.0.6 is acting strangely of late. When viewing the thumbnails & clicking the picture I want to appear in the lower window pane sometimes the picture is not there. There is only this gray area with an explanation mark in the center with a border that looks like perforations with rounded corners. This is becoming more prevalent lately with some of my later pictures although not all of them, what's going on? Sometimes we get a message to optimize iphoto and rebuild the thumbnails, is this what will correct our problem. It is extremely frustrating to not be able to view, correct, export my pictures. Help!
iPhoto creates thumbnail images of your original photographs to improve handling performance. It's possible that these thumbnails are becoming corrupted over time, causing them not to display properly.
Have you checked the original images to make sure they are not corrupted as well? If the original images are intact, then rebuilding the thumbnails would be beneficial.
Are you noticing any other anomalous behavior from this machine? If so, run Disk Utility (Applications > Utilities > Disk Utility), and verify the status of the drive.
Please note that Apple no longer supports iPhoto since they upgraded to the Photos app in 10.10.3 Yosemite.