Hi John,

We can reset the printer system on your computer, then download the latest drivers and software for the printer from the Canon USA to see if this will resolve the issue.

To reset the printer system, please follow these steps:

1. Go to your Apple icon on the upper left corner of your screen.

2. Click System Preferences.

3. Click Print & Fax.

4. Right click your printer on the left and select "Reset printer system". Note: If right click does not work, press and hold the

control key on your keyboard and then click the mouse button.

5. If your printer is still listed on the left select your printer and then click the minus (-) button to delete it.

6. Restart your Mac.

Next, please click here to go to the Drivers and Software page for the PIXMA MG5420.  Once on the initial download page for your model, please do the following:1. Verify that the operating system detected in the "OPERATING SYSTEM" drop-down menu is correct, and if it is not, please click the drop-down menu to select your operating system.2. Next, please click on the red arrow next to the "DRIVERS" section and click the CUPS drivers file. When you do, a red DOWNLOAD button will appear. Please click on the checkbox below the DOWNLOAD button, then click the red DOWNLOAD button to begin the download. The time for the download process may vary depending on the speed of your Internet connection and the size of the file being downloaded.Once you have downloaded the CUPS drivers file, please follow the steps above to also download all other items from the DRIVERS section.  If you plan on using the printer wirelessly, you will also want to download the Canon IJ Network Tool from the SOFTWARE section.  

Once all items are downloaded, please double-click on each of the items to install them on your Mac.  Please ensure that the IJ Network Tool is the last item installed if installing the printer wirelessly.  Once all items have been installed, please attempt to print.  Hope this helps!

This didn't answer your question or issue? Please call or email us at one of the methods on the Contact Us page for further assistance.

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