Update on self-signed certificate

[John-P2]

I too needed to create a new self-signed certifcate on my mac and followed the instruction HP provided. However, my printer seemed to still indicated that there was a certificate error and would not print. I noticed a little right-pointing arrow in the upper righthand corner of the "Print Center" application that shows up on the dock of my mac. I clicked on the arrow. The error message disappeared and the printer responded by printing my document. I was able to print a second document without incident. 

FYI, these are the instructions I compiled using Google AI. There are almost entirely the HP instructions. I used the IP address approach to enter EWS.

Here's a breakdown of how to create a revised certificate for your HP printer on a Mac, addressing the "Encryption Credentials Expired" error, often experienced by Mac users.
1. Accessing the Printer's Embedded Web Server (EWS):
• Using HP Smart App: Open the HP Smart app, select your printer, and go to "Printer Settings." From there, select "Advanced Settings" or "Embedded Web Service (EWS)".
• Through System Settings (macOS): Go to System Settings (or Preferences) > Printers & Scanners. Select your printer, go to Options & Supplies, and choose "Show Printer Web Page". You may need to bypass a security warning in your browser to access the page.
• Via IP Address: If you know your printer's IP address, type it directly into your web browser's address bar to access the EWS.
2. Generating a New Self-Signed Certificate:
• In the EWS:
◦ Navigate to the Network tab.
◦ Expand Advanced Settings and click on Certificates.
◦ Click Configure.
◦ Select Create a New Self-Signed Certificate.
◦ Click Next.
◦ Click Finish.
◦ The printer will generate a new self-signed certificate, typically valid for 10 years.
3. What to do after creating the certificate (if needed):
• Trust the Certificate in Keychain Access:
◦ If your Mac still flags the expired certificate after generating a new one, you might need to manually trust it.
◦ Open Keychain Access (search using Spotlight).
◦ Search for "HP" and find certificates related to your printer.
◦ Right-click and delete the old certificate.
◦ Restart your Mac.
◦ If the issue persists, go back to Keychain Access, import the new self-signed certificate you just created on your printer, and set it to "Always Trust".
• Reset the Printing System: If other steps fail, try resetting the printing system in System Settings > Printers & Scanners. This will remove all printers, so you'll need to re-add your HP printer.
• Ensure "Secure AirPrint" is selected: When re-adding the printer after a reset, ensure "Secure AirPrint" is selected in the "Use" dropdown.
Important Notes:
• Bypassing Security Warnings: When accessing the printer's EWS via your Mac's browser, you might encounter a security warning due to the self-signed certificate not being officially recognized. You can usually bypass this by choosing "Advanced" and then "Proceed (unsafe)" (or similar wording depending on your browser).
• Windows vs. Mac Instructions: While HP's documentation might suggest using a Windows computer for some of these steps, they can generally be accomplished on a Mac. The instructions about accessing the EWS and generating a new self-signed certificate are essentially the same regardless of the operating system used.
• HP Smart App's Diagnose & Fix: The HP Smart app on your Mac might have a "Diagnose & Fix" option that could help troubleshoot certificate or connection issues.
• Firmware Updates: Ensure your printer's firmware is up to date, as this can sometimes cause printing issues.
By following these steps, you should be able to create or update the self-signed certificate on your HP printer using your Mac and resolve any "Encryption Credentials Expired" errors.