My MacBook with OS Big Sur will no longer work with my 6500 E709a. Cannot find drivers.

[MikaMike]

I don't know how to install drivers:
https://ftp.hp.com/pub/softlib/software12/HP_Quick_Start/osx/Installations/Essentials/ASU/HewlettPac...

The messages I have :
Unable to open "HewlettPackardPrinterDrivers.pkg" because Apple cannot check it for malware.
This software needs to be updated. Contact the developer for more information.
Safari downloaded this file today at 20:49 from ftp.hp.com.
And then :
Safari is unable to open the file "HewlettPackardPrinterDrivers.pkg" because none of the available applications can open it.

Translated with www.DeepL.com/Translator (free version)

[GhostP]

If you are absolutely sure that it is the correct driver, you can change the security setting TEMPORARILY. ATTENTION AT YOUR OWN RISK !!! Go to System Preferences> Security. Under the tab "General" you should see the blocked Origin installation, with an option to allow the installation. Allow> Install the update.

[MikaMike]

OK Thank you. It is ticked "Allow applications downloaded from : App Store and identified developers. I have no other choice.

[MikaMike]

Hello, it's still not working.

[MikaMike]

Hello,
I can't install the program :
Cannot open "HewlettPackardPrinterDrivers.pkg" because Apple cannot check it for malware.
This software needs to be updated. Contact the developer for more information.
Safari downloaded this file today at 11:58 from ftp.hp.com.