oh, Core Audio was already disabled. I now enabled it and it now shows a window "Updating Information about Audio Unit plug-ins...". Which right now only crashed the auvaltool. And keeps doing that (I get like 10 to 15 auvaltools in my Force Quit Applications window. Logic is shown as not responding. And my fans are on.
Was able to quit Logic Pro, after a window popping up, notifying me about some plugins not working. And now.. same issue. Seems we're onto something now.