How to identify a legacy extension?

What should be more annoying is you managed to install a system modification onto your Mac that you have no idea you did.

System Information > Software > Extensions will list all, and you may be able to sort by where they came from. That might isolate the non-Apple ones, but you would have to go through each, looking at the Info to see if any said Palo Alto as the developer.

Or, you can search the internet for “Palo Alto software” and find they make some sort of cybersecurity software.

The hits just keep coming. You don’t know what you installed and it might be some useless malware that purports to protect you from other malware. But, they seem to be more enterprise oriented, so maybe not the same Palo Alto.

To add to previous suggestion.

Download the Application Etrecheck directly from an ASC Contributor ( Not me ). And Safe to use.

The application is free or paid from added features. 

Run the application with Full Disc Access ( Security & Privacy - Full Disc Access ).

It will take a Snap Shot -  both the hardware and software.

 The Report will Not Reveal Any Personal Information. 

Post back the Full Report - copy and paste - using the Additional Text Icon ( 3rd Icon to last )

We can have a look at the report for possible issues and may have possible suggestions to resolve the issues.

It could identify the problematic extension is short order.