On some old photos, but not all, when I choose them, in batch or singles, I get an error message that says I don't have permission to open them. I go to Get Info and under Permissions, it says that I have permission to "read and write." So why can't I open my old photos?
iMac (Retina 5K, 27-inch, Late 2014), OS X Yosemite (10.10.2)