Apple Photos displays incorrect thumbnails for some photos

Apple Photos on Mac OS 10.11 (El. Capitan). Some photos have mixed up thumbnails. Basically this means that preview thumbnail is one photo, but when a user double clicks on the thumbnail, a completely different photo is displayed...

Apple's old iPhoto used to have an option to re-built thumbnails. Unfortunately the new Photos app does not currently have this option. If the thumbnails are completely messed up, it's probably easiest to delete the whole library and re-download from iCloud. If only limited number of photos are affected you can force thumbnail refresh by rotating the affected photos clockwise and then back anti-clockwise. This can be done for multiple photos at once.

Mac OS 10.11 (El. Capitan)
Apple Photos



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