@Olof said:
We are working on an update that will fix this. In the meantime you can try this workaround: https://ask.audio/articles/audio-plugins-not-working-in-garageband-on-macos-10-13-high-sierra-here-s-a-fix
PLEASE, I HAVE THE SAME PROBLEM, AND I NEED TO USE GARAGEBAND. PLEASE LET ME KNOW WHEN THIS PROBLEM IS OK.
THANK YOU!
DAMIANO