trying to download photoshop but when I try to install and the creative cloud thing pops up and it's just blank. no error or anything... just blank. please help

Sallyp have you tried the steps listed in App doesn't open | Progress wheel spins continually to resolve the current error?

wow, it's happening the same to me

Do you are trying installing the cretaive cloud on a iMac 27 Retina as well?