After updating my photo library, all my photos are now blank
Hello,
I got a notification that I needed to update my photo library. I did so, but now all my photos are blank. They're just grey squares when I scroll through them. When I click on a grey square, one of my photos does pop up, but for some reason they're not when I look at all of them. I do have an older Mac that hasn't been updated to the OS X Yosemite or any of the newer versions. Is this what's causing it? How can I get my photos to show up again?
MacBook Air, Mac OS X (10.6.8)