'hpPostProcessing.bundle' malware?

HP has fixed the drivers with new signature. You have to install this package. Worked for me.

ftp://ftp.hp.com/pub/softlib/software12/HP_Quick_Start/osx/Installations/Essentials/hp-printer-essentials-S-5_14_8_4.pkg

A new update was pushed out yesterday - with not enough press coverage it would seem

Try this

ftp://ftp.hp.com/pub/softlib/software12/HP_Quick_Start/osx/Installations/Essentials/hp-printer-essentials-S-5_14_8_4.pkg

This has made my day a whole lot better!

Did it work? If you look in the FTP directory

ftp://ftp.hp.com/pub/softlib/software12/HP_Quick_Start/osx/Installations/Essentials/ 

suggested by SS_MedPhoto, the date of the file

hp-printer-essentials-S-5_14_8_4.pkg 

is 10 July 2020, not yesterday.

"HP Easy Start" (the installer for ¿any? printer controller & software) installs the latest available "printer essential" and the latest hp scan utility and drivers if needed.

Perhaps this is the easiest way to reinstall your printer

I just installed the link suggested by SS_MedPhoto above (for hp-printer-essentials). I am now getting the error: "Matterhorn.framework" will damage your computer....

BUT after clicking 'ok' on that error message about a dozen times... it finally printed!

Fingers crossed this is now fixed!

Same problem with my HP2015dn printer ... just won’t print, MacBook ‘finder’ doesn’t even show its connected it’s not an AirPrinter - It’s connected with a Ethernet cable ... so I’m stuck for the moment/- has anyone got a fix ???

Thanks for the advise and your time & help, I deleted The printer , then re instated As you did ..- then changed to generic driver ... and It Worked ! ... you are my hero!!! Thank

you 😀😀😀🤙🤙

User ewayte found the main reason. It's part of the link he supplied:

From sources familiar with the matter that HP Inc asked Apple to revoke its printer driver code-signing certificates. It appears this request backfired as it left users unable to print. A HP Inc spokesperson told us on Friday night:

We unintentionally revoked credentials on some older versions of Mac drivers. This caused a temporary disruption for those customers and we are working with Apple to restore the drivers. In the meantime, we recommend users experiencing this problem to uninstall the HP driver and use the native AirPrint driver to print to their printer.

datfu Said:

”Found on HP forums”

———-

Please Provide Some Successful Links:

Any particular post(s) on there with a reported solution? If so, please provide the link(s) to it. Providing the link(s) might get a solutions(s) that we need.

I too was hit with the cluster 'F" trying to print something yesterday. After reading the forums I pulled out my old white MacBook running Snow Leopard, 10.6.8. I was able to print from it with out any issues. So I enabled printer sharing on the MacBook, deleted the existing printers on each Mac and added the new shared printer. We can now print from any Mac on the network.

Since the latest updated drives linked here;

ftp://ftp.hp.com/pub/softlib/software12/HP_Quick_Start/osx/Installations/Essentials/hp-printer-essentials-S-5_14_8_4.pkg

Still gives errors on some of our Macs running Catalina, if you are lucky enough to have a Mac on older OS it may be easier to support.

I can only see this getting worse for older printers going forward.

Good Luck!

Tim AKA GadgetBear

I do have a few macs around. I generally use a raspberry pi when I need a print server.

I have found that using the built in cups ppd files via local host:631 generally gets me good outcome. Using the usb Port on macs direct to printers is getting more tricky but then, using cups directly is more forgiving than the Mac system.

in my experience even really old printers can generally cope with being told they are a generic pce-hp laserjet 4 or 5. That is regardless of whether they are hp or something different like a Kyocera. In my experience the cost of running Kyocera printers is really good and they hardly ever go wrong.

I used CUPS to drive a HP Laser 4M till it finally died around 10 years back, replaced it with the HP 1320 we are using now. With the price of toner carts you'd think HP would have an incentive to keep their software up to date. Using the HP Easy Start, it fails to find drivers for the 1320 and a search on HPs website list only OS9 drivers.

MacOS uses CUPS every time you print. Yet the number of postings specific to CUPS is extremely small.

That is truly remarkable, given the complexity of CUPS, but the simplicity it imparts to Mac Printing.

It is not malware, it is a certificate withdraw that was accidentally perpetrated by apple after a request by hp. Some people seem to manage by just reinstalling the standard driver pack.

apple should be issuing an upgrade imminently but meantime try the link two messages up and failing that, put a generic driver in place.

The file in question (whether the ftp or http link) is widely reported as ineffective. The System updates is still ineffective (Command+R notwithstanding).

The files recommended here are time stamped in June with the exception of one (...ASU/Hewlettpackardprinterdrivers...) which is dated 6th October. (i.e. not the one pointed to above)

It seems surprising to me that in June, HP had a file that was going to fix a problem that had not yet been caused and a fault that was actually going to be within within the OSX security signing system rather than anything to do with the drivers themselves.