when i enlarge photo (on some of my pictures) it quickly changes to a triangle with an exclamation point in the middle - how do I correct this problem?
It started a few days ago. I was looking through my photos. I could check them when they were smaller - as soon as I enlarged them - screen turned black, a grey triangle with an exclamation point appeared in the middle. It is not changing every picture - just some. How do I get rid of this problem? What caused this in the first place? Any help would be appreciated.
MacBook Pro, Other OS, OS X 10.8.5 (12F45)