If you need to manually remove third-party Audio Units plug-ins, you can find the files in the Library folders on your Mac.
You can install Audio Units plug-ins from manufacturers other than Apple to process audio in Logic Pro, GarageBand, MainStage, and other audio and video apps. When installed, Audio Units plug-ins appear as individual components in the Library folders on your Mac:
In the Finder choose Go > Go to Folder, enter “/Library/Audio/Plug-Ins/Components” into the Go to Folder field, then click Go.
Built-in effects and instruments included with Apple apps like Logic Pro, GarageBand, and MainStage don't appear in the Library folders and can't be removed manually.
What to do if Logic Pro isn't working as expected
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