It appears that the drivers for the MP480 are not working correctly. We
recommend that you delete the current MP Drivers and reinstall the MP
Drivers from our website.
Please perform the following to uninstall the printer driver: (If
certain items are not listed or found, move on to the next step.)
1. Unplug USB cable from printer.
2. Click on the Apple menu, and select 'System Preferences'.
3. Click on 'Print & Fax'.
4. Click on your printer on the 'Printer' list, then press the '-',
minus, to delete printer.
5. Click on 'Delete Printer'. The printer is removed from 'Printer'
list.
6. Close 'Print & Fax' window.
7. Open the hard drive (Macintosh HD).
8. Open the 'Library' folder.
9. Open the 'Printers' folder.
10. Open the 'Canon' folder.
11. Send the 'BJ Printer' folder to the trash.
12. Return to the 'Library' folder.
13. Open the 'Receipts' folder.
14. Locate any items related to your printer and send them to the
trash. However, leave the 'Canon Printer Drivers.pkg' file in the
folder.
15. Reopen the 'Library' folder.
16. Open 'Image Capture' folder.
17. Open 'TWAIN Data Sources' folder.
18. Send the 'Canon MP480.ds' folder to the trash.
19. Empty the trash.
20. Restart your computer.
Next, pleas follow these steps to download and install the Snow Leopard
drivers from our web site:
1. Visit Canon's website at: http://www.canontechsupport.com
2. Select your model in the following manner:
a. Click on Consumer & Home Office.
b. Click on Support & Drivers.
c. In the center of the window for '1 Product Type', click on
Printers & Multifunction.
d. In the center of the window for '2 Product Family', click on
PIXMA MP series.
e. In the center of the Window for '3 Model', scroll to MP480 and
click on 'Drivers & Software'.
3. Choose [MAC OSX] from the Operating System drop down box. Please
do not select Mac OS X v10.6, this option is currently not working
correctly. We are working to correct this selection.
4. Click on Drivers and select [mcpd-mac-mp480-10_42_1-ea8_2.dmg] for
the MP480 series CUPS Printer Driver.
5. A File Download box should appear. When it does, select Save.
6. Once the download is complete, click on 'I Decline - Go Back' and
you will return to the previous page.
7. Click on [msd_-mac-mp480-14_8_5-ea8_2.dmg] for the MP480 series
Scanner Driver.
8. Read the License Agreement on the next page, and if you agree,
click on 'I Agree - Begin Download' at the bottom.
10. Once the download is complete, click on 'I Decline - Go Back' and
you will return to the previous page.
11. Click on [mpnexosx204ea8-2.dmg] for the MP Navigator EX Ver. 2.0.4.
12. Read the License Agreement on the next page, and if you agree,
click on 'I Agree - Begin Download' at the bottom.
13. Once the download completes, close all windows.
14. Double click [mcpd-mac-mp480-10_42_1-ea8_2.dmg ] to install the
CUPS printer driver. Follow the prompts to complete the installation.
DO not restart your computer until after install the MP Navigator
program. Drag the Restart window to the side and continue to the next
steps.
15. Double click [msd_-mac-mp480-14_8_5-ea8_2.dmg ] to install the
scanner driver. Follow the prompts to complete the installation. DO
not restart your computer. Drag the Restart window to the side and
continue to the next step.
16. Double click [mpnexosx204ea8-2.dmg] to install the MP Navigator EX.
Files will extract, follow the prompts to complete installation.
17. Reconnect the USB cable to the MP480.
Please try scanning again by opening MP Navigator directly. Does the
issue persist?