How clear "System Extension Blocked" message on MacMini startup?

I no longer have an HP printer so I just deleted the hp extensions from the Library/Extensions folder which seemed to solve it.

There are more than one Library folder.

1. From the Finder, select the Go menu at top of the screen, and choose Go to Folder.
2. In the window that opens, enter /Library/Extensions, and click Go.

I still have my HP printers which still work with each OS upgrade.

My nasty dialog "Blocked etc" shows every time I re-boot the Mac.

Thanks to a smart tech at Apple Support, went to Macintosh HD/Library/Extensions and moved all the "hp_" extensions to an external SSD just in case.

Rebooted and annoying "Blocked etc" dialog no longer is there. AND I then printed to my HP just a one-page document and still works!

PROBLEM SOLVED

Thanks for the navigation instructions. I found 14 Legacy Developer: Hp install attempts. I clicked on one, restarted mac but still get the warning. I'm assuming this has to do with allowing my computer to talk to my HP printer. Do I need to click on all 14 listings?

Thank you,

C.

Have you fixed the issue? I also have 14 'Hp' lines which are inactive. However there is no option to remove them. PS I don't have an Hp printer installed still there is the line ' Legacy Developer: Hp'

I am having the same problem with this System Extension Blocked message. When I go into Privacy & Secuirty and review the this message I don't get an option on the next screen to delete the extensions, they are all turned off

I do have an HP printer but haven't installed anything on my computer for it in years. The message just started popping up maybe with in the last 1-2 weeks when I restart. My macbook pro is running Sonoma Version 14.6.1.

There is no option for me to delete these..

Hi iZac100, thank you for the solution. I deleted the hp files too and it worked :).

I didn't find the Library/Extensions folder, some idea of how can I find it ?

Perfect ! Thanks a lot !