Salut Lucien I tried several times to setup SDbeta under MacOSX with no luck - bugs, bugs, bugs... When you still have got the MacOS9 version of SD just install Classic and OMS. It works ways better than MacOSX/SDbeta unless you access your AMT8 within MacOSX. Just make sure there are no applications running in MacOSX which connect to your AMT8. I've got no problems editing my Matrix1000 under Classic/OMS2.3.8/SD3.0.5. An alternative would be (open source, still under developement) http://www.jsynthlib.org/ Hope that helps Greets groba