Cannot Load DeEsser.ny into Audacity 2.4.2

Hello All,

I am using Mac OS Big Sur 11.2.1 and Audacity 2.4.2
I have downloaded a DeEsser plugin I found reviewed on the Audacity forums, but it does not show up in the options when I go to the manage plugins menu on Audacity. Please advise. Thanks:)

The DeEsser plugin is a “Nyquist plug-in”. Installation instructions for macOS are here: