AU plug-ins don't show up
I've read other questions that has the same problem and I've tried to follow those steps. But the plug-ins I downloaded still don't show up.
This is how I downloaded plug-ins:
I opened Finder> shift+command+h to open Home> Library>Audio>Plug-Ins>Components and paste my downloaded plug-ins...
..like this. And what I saw in GB was...
...nothing.
I'm not sure if I downloaded correctly or something but I found a reply from How do I get audio unit instruments to work in new Garageband? from admidland who had exactly the same problem as mine. The magical 8 bit plug-in didn't show up.
GarageBand 10, OS X Yosemite (10.10.5), Macbook Pro with Retina display