iPhoto is your default application to download photos and as soon as
you plug in your camera it launches. You can install the Canon software
but may have to change the iPhoto preferences for it to run. Another
way to go is to get a picture card reader. They run about $20-$30. you
would then take the picture card out of the camera and put it in the
reader. The computer should then see the card as an external drive and
you can simply drag the movie files onto your computers hard drive.