hppostprocessing.bundle problem when printing

I can't print via the HP driver, generic PCL, generic IPP, PostScript.

What I can do is flip open an old Mac running a pre-2014 HP driver on Mac OS 10.9, and share the printer for my newer Macs.

That's done in System Preferences>Sharing on the old computer. You can turn on Printer Sharing for as many printers as you like.

On the new computer, make a new printer and select the shared printer, which will be the name on the old Mac "@" the name of the old Mac. Use the appropriate HP driver.

I get all the same printer features!

I'm printing to my HP CLJ3600. Your mileage may vary.

The problem is the security certificate between HP and OS Catalina. It expired and HP doesn't seem to want to fix that.

For this minute, you will just have to install your HP Printer as a generic printer. Instructions are above in this thread.

I just had an online Chat with Apple Support. They told me to reset my printer system:

System Preferences

Printers & Scanners

Hold Control key while on list of printers and click "Reset printing system."

This will delete all your printers.

Then re-install your printer. Here's an article with instructions:

https://support.apple.com/guide/mac-help/add-a-printer-on-mac-mh14004/10.15/mac/10.15

I did this and now I can print. I still get the annoying error message, but once I click OK, my document prints.

It was a little disconcerting that the person I chatted with had not heard of this problem. Seems major to me.

Good night and good luck, everyone!

Using "Generic PostScript Printer" will work, but it's a temporary fix, not a permanent solution. Using a general-purpose PS driver, you will not get all of the printer-specific options in the Print dialog that you may require.

A link to updated drivers on HP's FTP site has been posted here a number of times. I've also had a notification of 'new' v5.1. drivers in System Preferences > Software Updates, which seem to work.

It's nothing to do with a Catalina update, but it's because HP revoked the certificates that sign the software. ("Unintentionally".)

What this shows is that MacOS will kill any software already installed on your computer if the certificate expires or gets revoked.

If you find that unacceptable, send feedback to Apple.

Not true. I had the problem with a 15 year old HP Laserjet 1320, chatted with HP Support. She had me install driver from here: hhttps://support.apple.com/kb/DL1888?locale=en_US

and that worked. I'm now able to print. However, after installing the driver you must go to System Preferences/Printers & Scanners and delete the printer and choose it again.

I have a HP PRO 500 MPF and encountered this problem. I downloaded the Apple HP Printer Drivers v5.1 for OS X as mentioned. I encountered the same sort of errors during the installation. Rebooted my MBP16 and tried reinstalling again. Still same issue. I'm on Catalina - 10.15.7.

I've also had this problem. I also had the problem of not being able to print to an HP Laserjet 1320 which is an older printer. I resolved both issues as of now with two steps.

1. I reinstalled the HP 5.1 driver package from the Apple support site as of this morning. This eliminated the error messages shown above.
2. I added my HP Laserjet 1320 back but selected the "Generic HP PCL Printer Driver" in the "Use" entry of the "Add" dialog. I've checked and it appears to work as it did before. I have not checked to see if the "Generic Postscript Driver" works.

I spend all weekend trying to resolve this printing issue. It would be nice to hear what HP plans to do about it. At least to let the community know that they are aware of the impact that this is having on the masses.

i have been having the same problem as others i see on here with no longer being able to print on my HP printer from my macbook air i tried to download the driver 5.1 but that would not work either. all my downloads say Paused

i'm not sure what to do

I had the same no print issues as everyone else here. I deleted all my Hp software, removed printer from system preferences , reinstalled and chose air print from the kind drop down menu. You can check supply levels right from system preferences and scan is now working thru system preferences or image capture also. This was an Hp office jet pro 8710 that was wirelessly connected to my iMac. Everything is working perfectly now with no Hp drivers at all.

So this article gives the explanation of why this error is coming up: https://www.slashgear.com/macs-label-hp-printer-drivers-as-malware-breaks-printing-for-some-25644330/

You'll need to use AirPrint. If you have an older model of printer this likely won't work. I tried it today on an old HP LJ P2055dn and that model doesn't have AirPrint so it didn't work. I did try all of the other options to add the printer via IP but none worked.

Will check back if anyone else finds a solution.

Everyone, I just discovered the new "HP Smart Desktop App" on the Apple Store fixed my printer issues. I didn't have to download any new drives...I just removed my old printer and installed the app. It detected my printer and worked. I was able to do a scan with the software. I haven't tested the fax capabilties yet.

To the best of my limited understanding somewhere between Apple and HP a certificate was wrongfully labeled as Malware. Rendering ALL HP printers useless on Macs once updated. I was initially relieved it wasn't a virus. But I've done everything they've asked to restore it with no luck. NOTHING is updating right, nothing is running right. Part of my is suspicious its more than they are saying but they don't want us to panic. But a computer without a printer is worthless to me and I'm ready to go buy a PC

I have a very old HP printer (HP LaserJet 1320) & I can share what worked for me.

1. Delete the printer on the Printers & Scanners screen is System Preferences
2. Delete the "hp" folder that shows up when you click "Show in Folder" on the error screen (it's 2 steps up in the folder hierarchy for me)
3. Disconnect & Reconnect the printer to your computer
4. The printer automatically showed up again for me and it asked to install an updated driver (5.1) which I did

After that, it started working fine again. Given how old my HP printer is (circa 2004), I think it should work for a lot of people. Hope this helps.

“HP Utility” will damage your computer.

I added the printer again as a generic PCL Laser Printer, it printed, however only in B/W.