Legacy System Extension error message macOS

Some users of macOS might receive a system extension error message if they're connecting their device, or starting their computer.

What to do if you get this error message on your Mac:

• The alert may ask you to open Security & Privacy preferences to allow the extension. You may also need to restart your Mac. 
• The alert may ask you to contact the developer for support because the extension needs to be updated or will be incompatible with a future version of macOS. If you continue to get this message, you may need to remove the driver extension with these steps:
• The alert may ask you to open Security & Privacy preferences to allow the extension. You may also need to restart your Mac.
• On a Mac with Apple silicon, you may first need to use Startup Security Utility to set the security policy to Reduced Security and select the “Allow user management of kernel extensions from identified developers” checkbox.