What is matterhorn.framework?

Hi!

this is related to this topic:

https://eclecticlight.co/2020/10/23/why-have-my-hp-printers-stopped-working-how-to-check-their-software-signature/

Update: HP Printer Software 5.1 should now be becoming available through Software Update to fix this issue.

(2220 UTC 23 October 2020)

I contacted HP about this. I had previously uninstalled my printer software and then reinstalled it. My printer is an HP Envy Photo 6234. After some failed attempts they suggested I 'perform reset printing system' using Finder, system preferences, printer and scanner, then right click, and reset. I did this and then clicked on the + icon and selected add a printer. I added my printer from the list then clicked the Add button. And all was well. Worked for me. Hope it works for you.

I installed up to date HP printer software which I downloaded yesterday to fix a related problem (namely the presence of supposed malware that prevented me from printing from my HP printer). The "Matterhorn.framework" error message then appeared today. Presumably, therefore, the up to date HP software does not yet fix this problem. Do you know if there is a way of resolving this issue currently? I tried right-clicking on the HP app and selecting "get info" but there was no option to override malware protection.

No, I did not. It was greyed out in the menu. Is there another way to do that?

HP should have an uninstaller. You may have to get an uninstaller from them as the one installed with the old software was declared “unsafe” by HP when they revoked the certificates.

HP is going to have to sort this out. Once you revoke a certificate, you can’t just say, “just kidding. It’s really ok, trust us.”

Hey all, friendly neighborhood tech here. What worked for a client of mine is I deleted the printer with the minus sign, then I added it back via bonjour, and instead of using the default drivers I selected Generic PCL and no error messages and all worked. Hope that helps someone. Namaste.

I received 2 warnings today while trying to print. First was "PDE.plugin will damage you computer." I removed the software and downloaded the appropriate software from HP. When trying to print with the new software installed I received "Matterhorn.framework" will damage your computer." I clicked "ok" anf a test page printed. I can't get any answers from HP's useless virtual assistant, but I believe it's more than coincidental that my 1 year warranty expired yesterday. I'm pretty sure it's HP's

way of trying to scare me into purchasing an extension on said warranty because the printer is printing and my computer is fine. Thank you HP. Extortion is such a nice look on you. SCUM!

I have just started having this problem today too.

I am running Big Sur 11.1, and I have also tried updating the HP drivers with the latest HP Easy Start tool (2.10.0.201112 - dated 12 November 2020)

HP Utility Version 5.48.0 (2065)

HP Easyscan Version 1.10.0 (200827)

I can still print by accepting the warning and continuing, but still, a bad look for HP not to keep their software and signatures up to date.

Probably some monitoring software for the printer. If the software is not signed and notarized, you can get that message. The OS is being blocked from scanning it by the software itself.

I started getting this message this morning. Comes up twice and click OK twice leaving the report to Apple populated and printer then works. Mine's an HP not sure if that is the reason

My HP Envy Photo 6255 printer suddenly stopped working. Got this error: “Matterhorn.framework” will damage your computer.

I am still getting this error despite updating drivers etc..... anything else, APPLE?

anything else, APPLE?

APPLE (nor Apple) is here.

Did you uninstall the software HP decertified?

No, I did not. It was greyed out in the menu. Is there another way to do that?

Installed latest HP 5.14.8.4 on OS X 10.15.7 but still getting the warning pop-up. HP needs to fix this.