Some photos in iPhoto showing as grey triangle with exclamation mark
Solution 1:
Try repairing the library. Hold ⌘⌥ and open iPhoto, then choose Repair Database.
If that doesn't fix it, hold ⌘⌥ and open iPhoto again, and select Rebuild Database.
Try repairing the library. Hold ⌘⌥ and open iPhoto, then choose Repair Database.
If that doesn't fix it, hold ⌘⌥ and open iPhoto again, and select Rebuild Database.