Installing FxPlug Plug-ins
Final Cut Pro searches the following folders for FxPlug plug-ins if the folders are present
on your system (they are typically created when installing third-party software):
 /Library/Plug-Ins/FxPlug/
 /Users/username/Library/Plug-Ins/FxPlug/
If you install an FxPlug plug-in and it does not appear in the Effects tab, make sure the
plug-in is installed in one of the folders that Final Cut Pro searches for plug-ins when
opening (see above for a list of installation locations).
If you installed the plug-in while Final Cut Pro was open, quit Final Cut Pro and then
open it again.
Final Cut Pro also searches for plug-ins in the default Motion FxPlug folder:
 /Library/Application Support/ProApps/Internal Plug-Ins/FxPlug/
Important:
You should not install filters in this folder yourself.