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AppleHow to fix Encryption Credentials Have Expired on Mac

How to fix Encryption Credentials Have Expired on Mac

You may sometimes get a strange error message when you print something on your Mac: Encryption Credentials Have Expired. In short, it means that the certificates for the printer, the Embedded Web Server (EWS), have expired. As a result, you can’t print documents.

Why does this error occur? The fact is that sometimes, after a macOS update, the system no longer trusts the old encryption credentials. These certificates are required to secure the connection using Secure Internet Printing Protocol (IPP) and Apple AirPrint technology. In other words, they are used to identify the printer software as safe and allow it to be used for printing.

If you encounter such an error, you should know that there are several methods to fix it. So let’s take a closer look at each one.

Reinstall the AirPrint driver

The main problem is that the credentials for the printer driver expire after a certain period. Consequently, this prevents it from printing. That’s why you need to reinstall the driver. To reinstall the AirPrint driver, follow these steps:

  • Go to System Preferences and select Printers and Scanners.
  • After that, find and select your printer in the list.
  • Then press Remove.
  • Next, click Delete Printer to remove it.
  • Navigate to /Library/Printers and drag your printer folder to Trash.
  • Empty the Trash folder, power off the Mac, and unplug the printer.
  • Now, turn on your devices and return to Printers and Scanners.
  • Finally, locate and install your printer. Don’t forget to change the driver from Secure AirPrint to AirPrint.

Once you have completed these steps, check that everything works and that you can print. If not, move to the next solution.

Reinstall the printer using the LPD protocol

Another way to solve the problem is to reset the printer using LPD. If you have already installed a printer via AirPrint, but it doesn’t work well with your Mac, you can switch to LPD and check the results. Also, this solution often helps if you are using an older printer. So do the following:

  • Go to Applications and select Utilities.
  • After that, open Printer Setup Utility.
  • Click on the plus sign to add the printer.
  • Then head to the IP tab and, from the Protocol list, select Line Printer Daemon (LPD).
  • Finally, enter your printer’s IP address, add a name and click Add.

Now, you should be able to use the printer on your Mac. However, if this solution doesn’t work for you, there’s another one.

Reset printer network settings

If you want to reset printer network settings on your Mac, you can follow these instructions:

  • First, turn off your router. Just unplug it.
  • After that, restart your printer.
  • Press the Setup button on your printer’s control panel.
  • Then navigate to Network Setup on your Mac and select Restore Network Settings.
  • Turn off your printer for 30 seconds.
  • Now, turn your router back on.
  • After the network connection is back, turn on your printer.
  • Finally, launch Wireless Setup Wizard for it.

Once you have completed these steps, check whether you can print something now.

Create a new self-signed certificate for your printer

Another option is to try to create a new self-signed certificate using the printer’s Embedded Web Server. You can use the home page of your printer to manage its settings. So here’s what you should do:

  • Open Safari and enter your printer’s IP address in the new tab.
  • Then press Enter to open the EWS page.
  • After that, navigate to the Network tab and select Advanced Settings.
  • Now, click on the plus sign and select Certificates.
  • Click Configure.
  • Next, click Create a New Self-Signed Certificate.
  • Finally, click Finish and let the printer create the new certificate.

You should also be aware that the steps above may vary depending on your printer model. Once you have completed these steps, check whether the error is gone, and you can print something.



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