A grey box and a triangle within the box a wth an exclamation point shows up when i try to open a thumbnail to a large photo. Someone suggested using the apple and option (alt) keys simultaneously while opening photos. where is the "apple" on air?
I have a mid 2012 macbook air running elcappitan 10.11.6 A grey box and then a triangle within the box with an exclamation point opens when i try to open thumbnails of photos recently downloaded from my Olympus camera. Old photos will open without this problem.
iMac (Retina 4K, 21.5-inch, Late 2015)