If you don't care about "actually" validating the audio units, you can trick logic into thinking it's validating a plug-in, when it's just automatically passing everything. The way I did this was, if you show hidden files and navigate into usr/bin, you'll find a combination of auval and auvaltool. What happens when you run auval, is it effectively forwards to auvaltool, and this is the new validation tool being used. You can delete auvaltool (or rename it or move it to keep from permanently losing the file), and this will solve all your problems. The only caveat to this method is that logic can no longer scan audio units being used, so if there are any that will crash logic, you won't be able to scan to prevent that.
What will happen is logic will launch AU Manager, it will scan the plug in(s), wait for the process to start, and instantly pass the audio unit. Amplitube will now be located where we all want it to be, no longer under "incompatible", once you pass these audio units, you can replace the auvaltool, and all will be back to normal, with AU Manager capable of scanning for serious problems.