Hi!
To ensure the most accurate information is provided, we will need to know the version of Mac in use (Ex. 10.7, 10.8, 10.9), as well as how you are connecting the printer (USB or wireless). Also, are you getting any specific error messages?
If this is a time-sensitive matter, our US-based technical support team is standing by, ready to help 24/7 via Email at http://bit.ly/EmailCanon or by phone at 1-800-OK-CANON (1-800-652-2666) weekdays between 10 AM and 10 PM ET (7 AM to 7 PM PT).
Thanks and have a great day!
