If you've got a Canon PIXMA MP280 and can't connect it to your Mac, this Canon PIXMA MP280 driver will fix it for you. It's specifically for the Canon PIXMA MP280 all-in-one inkjet photo device. Note that this is the driver for the Printer only but you can also download the driver for the scanner driver.
Download Canon PIXMA MP280 Driver 17.7.1a in