Can't open more than one set of photos at a time

  webb_cliff 11:08 19 Feb 2019

When I have one set of pictures open, my Mac Air won't allow me to open another set, telling me I don't have permission for them. They are my own creations and when I close down the other set, I can usually open them, and they all are set to allow me to do anything, as they are my own creations or downloads. How can I cure this? Cliff Webb

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