How to move pictures from iMac to SD card?
I have a new imac with an SD slot on the side. When I plug the SD card into the side it imports to iphoto automatically but I am having trouble reversing the process. I have opened iphoto and the SD card in finder, drug the pics from iphoto to the card, they show up in finder as jpegs but when I unmount the card and then plug it back in iphoto says that there are no valid files on the card. The pics are there in finder but cant be opened by iphoto. My camera (Canon Rebel T2i) also does not recognize that there are any pics on the card. I need to be able to send pics back to my spare SD card for printing purposes... what am I doing wrong? Thanks in advance for your help.
iMac (21.5-inch Mid 2011)