Currently Being ModeratedJan 15, 2013 11:14 PM (in response to undral)
Do you see your printer as one supported in OS X here - http://support.apple.com/kb/HT3669#canon?
If so, download the printer drivers here - http://support.apple.com/kb/DL899.
If not listed, you may have to contact Canon to see if they've any types of work-arounds.
ClintonMacBook Pro (15-inch Late 2011), OS X Mountain Lion (10.8.2), 16 GB RAM, 512 GB SSD, ATD
Currently Being ModeratedJan 16, 2013 2:38 PM (in response to undral)
As documented by Canon, if you upgrade from 10.6 or 10.7 to 10.8, you need to remove the older Canon UFR2 driver and then install the latest version that supports 10.8.
First you will need to open Print & Scan and remove the current iR2520 print queue.
Then open Finder and navigate to HD > Library > Printers > Canon and trash the UFR2 folder.
Sill in Finder, navigate to HD > Library > LaunchAgents and trash the file "jp.co.canon.UFR2.BG.plist".
Then restart your Mac and install the UFR2 v2.43 driver. With the driver, create the print queue again, select IP > LPD for the protocol. This new version should allow you to print from 10.8.