I wouldn't mind waiting 15 mins if that was it but Logic won't boot. It keeps wanting to do this download every time! It never installs it. It's insane. Is there anyone from Apple on here that knows what to do?
There's nothing remotely obvious. Perhaps there is a file that Logic writes to indicate that it has access to the required content. If you have a permissions problem, it would not be able to write that file. Repairing permissions, reinstalling etc., might help.