From: Fernstudio <fernstudio@...> > Apparently, when Logic starts up, there is an AU validation that > occurs and the NI plugs fail this. Hi all, please keep in mind that AU validation is not a Logic/Emagic invention but provided by Apple since more than a year for developers. AU validation helps developers to test their plugins before release and has been a prerequisite for manufacturers to brand their plugins as "AU compatible". AU validation checks certain technical areas of plugins and qualifies the results. If a plugin fails AU validation, then this simply means that the developing company did not work according to Apple specs (and in return should not have branded their plugin as AU compatible). Since all pro applications (like FCP HD) still work with non-validated plugins, you could take the validation Logic performs as the first step to ensure a more stable system - and to show developers that they must meet the technical guidelines for Audio Units in the future. Here a short quote from Apple ADC: "Have you created a compliant audio unit or audio unit hosting application for Mac OS X? Tell the world by using the Audio Units logo. This update provides enhancements for more complete verification of compliance with the specification." http://developer.apple.com/softwarelicensing/agreements/audio.html Best regards, Thomas