viewing camera files
I have tried to transfer photo files from Nikon D7000 and also Nikon Coolpix AW120. iMac Finder does not show the camera or photo files. I prefer to transfer the files to external hard drive but can't see the files to transfer. What do I need to do to see the files? Thanks
iMac (21.5-inch, Late 2013), OS X Yosemite (10.10)