I am new to the mac format, having just purchased my first imac a week ago. The first time I tried to import video files (in .mts format) from my Canon video camera through imovie, it worked perfectly. I tried to import additional videos today and imovie will not recognize my camera. I am connecting to the imac through usb and have the camera set to the computer input mode. Also, iphoto does recognize the .jpg photos that are on the camera's SD card. I've restarted the imac and reconnected the camcorder several times, but have not been able to get imovie import to work. Any suggestions would be much appreciated.