Managed Software Delivery detection rule for Mac

I am working in the Symantec Management Console 7.6 and creating a managed software delivery for Symantec Endpoint Protection 12.1.6 to be installed on Macs. I created the software package just fine but the detection rule is not running properly. When the schedule runs to install the software the detection rule runs no matter if the software is already installed or not. Below is a screenshot of the rule. Is there something I need to change so the detection rule actually detects if the software is installed or not?