Where are AAX Plugins Located?
This video will show you. The AAX plugin location is the same for Pro Tools, Media Composer, Pro Tools | First, and Media Composer | First (as well as other programs that can use AAX plugins).
▶Windows: C:\Program Files\Common Files\Avid\Audio\Plug-Ins
▶Mac: Macintosh HD/Library/Application Support/Avid/Audio/Plug-Ins
All AAX plugins will install to this directory by default, don’t change it! This is the ONLY path that Pro Tools or Media Composer will recognize for audio plugins.