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

Question

Level 1

16 points

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

On starting up my Mac Mini M1, 2020 running Ventura 13.5.1, the following message displays:

System Extension Blocked

A program tried to load new system extension(s) signed by "Legacy Developer: Hp". You can enable these extensions in Privacy & Security System Settings.

With the following options

OK

Open System Settings

I don't see what I need to do specifically to clear this. Earlier, someone cited an issue with fonts, but they weren't specific enough for me to see what I should do.

Any ideas how I can clear this somehow?

Thanks!

Bruce

Mac mini

Posted on Aug 18, 2023 3:36 PM

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Answer 1

Top-ranking reply

bkengland2 Author

Level 1

16 points

Aug 18, 2023 5:56 PM in response to bkengland2

Ahh, I figured it out while trying to solve another problem. The place to go is in Privacy & Security System Settings, all the way at the bottom, here:

Click Details and look for the culprit to give permission to.

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Answer 2

Mar 29, 2024 1:50 PM in response to bkengland2

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

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Answer 3

iZac100

Level 1

17 points

Jan 6, 2024 11:40 AM in response to Sebastian301

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

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Answer 4

C.A.220

Level 1

33 points

Dec 1, 2023 8:42 AM in response to bkengland2

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.

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Answer 5

Jan 6, 2024 6:24 AM in response to C.A.220

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'

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Answer 6

dasy4me

Level 1

12 points

Sep 1, 2024 2:31 PM in response to bkengland2

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

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Answer 7

bkengland2 Author

Level 1

16 points

Sep 2, 2024 2:36 PM in response to dasy4me

Interesting. Maybe you somehow accepted them previously so now they're in. I see you have them turned off. I wonder if there are associated files in you system you can just manually delete. But I don't know if you can or if it would do the trick.

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Answer 8

dasy4me

Level 1

12 points

Sep 2, 2024 2:54 PM in response to bkengland2

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.

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Answer 9

bkengland2 Author

Level 1

16 points

Dec 1, 2023 6:26 PM in response to C.A.220

As I recall, yes, I had to clear more than one of these to get the result I was after. Good luck!

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Answer 10

Jan 6, 2024 5:54 PM in response to iZac100

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

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Answer 11

Jun 27, 2024 4:45 AM in response to iZac100

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

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Answer 12

BDAqua

Level 10

250,253 points

Jun 27, 2024 5:56 AM in response to GuillermoVargas

There are more than one Library folder.

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

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