My Canon 4200 stopped working with iMac last update--HELP

Please do the following in this order:

•  Uninstall all Canon software, put in the Trash and empty the Trash.
• Please reset the printing system per Reset the Mac printing system to solve a problem
• Next, follow the instructions in Adding a printer

Please remember printer & scanner drivers are provided to Apple by the manufacturer of the device. When a manufacturer (lets say Epson in this case) does not supply up-to-date drivers that is their way of telling you to buy a new device.

If your device is a scanner, then please use the pre-installed ImageCapture app. If Image Capture does not work, you can also try Vuescan available at VueScan Scanner Software for Windows, Mac OS X and Linux. To learn more about Image Capture please click Image Capture Scan images in Image Capture on Mac

Hello MCSfromrichmond.

Is this the Canon PIXMA iP4200?

And what macOS did you upgrade to? And from?

FYI - macOS Catalina has no support for 32-software, and I suspect the software that was driving your printer was just that.

You will likely need to find new (alternative) driver for the printer.

Try here: Gutenprint for Mac OS X

Excellent!