At the moment, we dont know which device to blame, the card or the camera. If it works with a different card then we know something is wrong with the card... if not, and you've properly formatted everything etc, then perhaps the camera has a problem. A couple of questions since you dont have a second card. First, if you format the card, shoot photos and then try to review your shot do you see the error? Or is it only after you pull the card and try to read it onto the mac and then re-insert it into the camera? If its the latter, how are you reading the files into the computer? If your using Preview, that is the source of your problem. Copy the files in first eject the card and then run Preview. Preview puts some hidden files (files that you cant normally see and are named with a . as the first character). The Fuji software screws up if it encounters hidden files it doesnt expect. If your not using Preview to read in the files, what are you using?