Re MAC ALERT RE POTENTIAL MALWARE : HP PRINTER FILE: "MATTERFORM.FRAMEWORK"

[abourn]

MACBOOK ALERT THAT "MATTERHORN.FRAMEWORK" FILE  IS MALWARE. 

[IronBadger · Accepted solution]

It really looks like those who are experiencing this issue are running older software signed with a certificate that expired today.

Please update your software using HP Easy Start as mentioned above. 

1. Download HP Easy Start

2. Follow the prompts for setting up your printer.  When you get to the software download it will show whether the software needs updated or not.  If it does the box next to Printer Essentials will be checked by default and you just need to select the Install button.

The following should not be necessary but if you want to be extra diligent and guarantee a clean new install.

1. Download HP Easy Start

2. Open HP Easy Start and Select the HP Easy Start Menu in the macOS menu bar.  In this menu select Uninstall HP Software.

3.Select Continue to start the Uninstall process

4. Once the uninstall completes.  Select Set Up New Device.

5. Go through the new device setup process by following the prompts.

6. This will lead to the software download/install prompt.

7. Select install and the remaining prompts to finish the process.

Edit:  Systems administrators and those unable to use HP Easy Start can use HP Easy Admin to download the software pkg files directly.

[CFitz]

I ran into this same problem for the HP OfficeJet Pro x576 on the date the update came out, although it initially started out with a message that the "HPPreProcessing.filter will damage your computer". So I updated my software, but I got the same message, replacing the HpPreProcessing.filter with Matterhorn.filter. I then followed the very clear and easy instructions to Uninstall all HP software, and then re-installed a second time. It cleared it up immediately!

THANK YOU, IronBadger!!! I don't know how many levels there are, but if Level 9 is not the highest, then you deserve a bump up in my book!!!

[tidbit10]

Easy install did not work but complete uninstalling did.  Thanks.

[Seib40]

Iron Badger, I was trying to figure this out all morning. Thank you for your reply. It worked for me 🙂

[GlobeMallow]

Complete uninstall was the ticket. What a clusterf***. Not sure who is asleep at the wheel on this, but...really?

Thank you for the post. 

[jpendle]

Iron Badger—I have this problem, but Uninstall HP Software is grayed out in the drop down list. Any suggestions? Thanks. 

[jpendle]

Never mind, I figured it out.  

[CFitz]

I know exactly where you were going with this - same issue here. I had to re-read the instructions before I figured out how to get the Uninstall to work! 

This was a very frustrating issue, but I was thrilled to find IronBadger's clear and successful fix!

[pmorrow]

Did all this and nothing worked.  The Apple folks say its something that only HP can fix.  Unfortunately, I see no way of ontacting HP.  My warranty is expired, so, guess im just SOL.  Thanks alot HP!  My software is current, my IOS is current, everything on my end is up to date.  What are you going to do about this HP????

PAUL