Step 3: Download and install the Canon LBP 2900's CAPT Printer Driver Version 3.85 from Step 1: Delete your current Canon LBP 2900 printer in Printers & Scanners settings (Apple > System Preferences > Printers & Scanners). Following are the procedures to get Canon LBP 2900 to work with Mac OS X El Capitan. How to update driver of Canon LBP 2900 to make it work on Mac OS X El Capitan?