Preview not saving JPG rotation? Use Exif data to fix rotated image display
I was driving myself up the wall recently trying to figure out why Preview.app would not save my image rotations, so looking for a solution I stumbled onto our friend MurphyMac‘s site and found a solution! Basically after you have rotated the JPG image in preview, go to Save and click on “Use Exif Orientation Tag” and your image rotation will be preserved. As MurphyMac warns though, if you don’t use Exif Orientation, you may experience some loss of image quality since the pixels are being rearranged, so it might be best to use the images backup. Thanks a bunch MurphyMac!