PIXMA G7020 won't work on Macbook Air, works OK on other devices

[M_McCarty]

• I have a Canon PIXMA G7020
• I added the printer through System Settings - Printers and Scanners
  • The printer worked fine.  I was able to print from my MacBook to the printer and receive scans from the printer.
• The paper settings became unusable on the printer and I reset it to “Factory Settings”
• After reconfiguring the WIFI settings on the printer I have been unable to print from my MacBook.  The printer works fine from our Windows notebook, iPhones and iPads. 

• When printing the printer shows green in System Settings.  As soon as I try to print, it switches to “Paused”.

• I have deleted the printer, reset Printing System and restarted my MacBook.  I have even tried installing the printer using Canon utilities.   The certificate issue persists.
  I opened an Incident with Apple and they escalated to the experts.  I was told this is a Canon issue and not a MacBook issue.  MacOS doesn't use certs to print.  I don't know how to proceed from here.

Thanks for any support you can offer.

[misteralex844]

It’s a Canon driver issue, not a macOS problem. After the factory reset the printer is now serving a new or invalid TLS certificate, and the Canon Mac driver pauses the queue when it can’t verify it. The fix is usually to remove all Canon drivers, reinstall the latest G7020 driver package from Canon’s site, and then add the printer using “IP → Internet Printing Protocol (IPP)” instead of AirPrint. This forces macOS to bypass the bad cert and restores normal printing.

[M_McCarty]

Thank you for the response.  I have followed your suggestions and I’m still receiving Invalid Certificate error.  I don’t know if I should generate a self-signed certificate using the Remote UI or not.  I don’t want to dig a deeper hole, since this printer works on our Win notebook, iPhones and iPads.

Thank you for any advice.

[robertrose]

Facing the same issue. Did you find a solution?

[DerrickL]

Understanding the PIXMA G7020 Mac Certification Error

Common Causes

• Driver Issues: The Canon PIXMA G7020 is an AirPrint-compatible printer, which means it typically does not require additional drivers. However, after certain macOS updates, users have reported issues with compatibility.

• Software Updates: Recent macOS updates, such as the Tahoe update, may lead to certification errors or connectivity problems with the printer.

Troubleshooting Steps

1. Check AirPrint Settings:

   • Ensure the printer is connected to the same Wi-Fi network as your Mac.
   • Go to System Preferences > Printers & Scanners.
   • If the printer is listed, remove it and add it again by clicking the "+" button. Select the printer and choose "AirPrint" as the option.

2. Restart Devices:

   • Restart both your Mac and the printer. This can resolve temporary connectivity issues.

3. Update macOS:

   • Ensure your Mac is running the latest version of macOS. Sometimes, updates can fix compatibility issues.

4. Network Configuration:

   • Check your network settings. Ensure that the printer's IP address is correctly configured and that it is reachable from your Mac.

Additional Considerations

• If the problem persists, consider checking Canon's support resources for any specific updates or patches related to the G7020 and macOS compatibility.
• Users have found success by using the printer's web interface to manage settings or by connecting through different protocols if AirPrint fails.

Following these steps should help resolve the certification error with your PIXMA G7020 on a Mac.

And this forum addressed this issue as well:

https://discussions.apple.com/thread/256035988?sortBy=rank