MacOS Plugins locations
Plugins on MacOS will be installed in the default locations. These locations might be hidden by your operating system.
The easiest way to open a folder is by clicking "Go" in the finders menu bar, and then select 'Go To Folder...'. Copy and past the path and click go.
AAX: ~/Library/Application Support/Avid/Audio/Plug-Ins/
RTAS: /Library/Application Support/Digidesign/plugins/
VST: ~/Library/Audio/Plug-Ins/VST/
AU: ~/Library/Audio/Plug-Ins/Components/
Applications: /Applications/