can't paste .dll plugin into plugin folder?

hi! i’m trying to paste KeroVee 1.61 into Audacity. i’m able to copy it just fine, but i’m not given an option to paste it. when i check my clipboard, it has been copied, and i noticed that it will paste into chrome. it just won’t into audacity’s plugin folder?? any suggestions?? i have a mac version 10.6.8

KeroVee is for Windows only, irrespective of any other issues on your machine. You can try

Assuming you’re using the current Audacity 2.1.2, see How do I install VST plug-ins?.