No Luck with any of the suppliers of the various plugins, which means we are either gonna have to wait around for them to finish the testing on their own to see if they need to update, or Apple explains why certain AU plugins work and some don't, I say that because it makes no sense that it will work in one DAW but not garageband.
I use GB allot for basic laying down of tracks for people who need to get a demo done, or if I'm writing myself, once thats done I usually port the stuff over to pro tools for the real work to begin, and now thats all on hold until this is fixed.
I have a small home studio and help local people who either can't afford, or aren't ready for a full blown studio session.
I hope someone address this issue soon as I believe the grayed out enable AU in the preferences is causing some sort of issue, but I will also blame it on myself for downloading it. If it had said BETA DOWNLOAD AT YOUR OWN RISK, I would have never done it as everything was working great, and never an issue.
Hopefully some resolution will come
Hope yours gets better, cuz mine seems to be getting worse, I now have issues with Chrome not remembering sign ins and passwords...what a pain...Live and Learn