It has come to our attention that some Mac users have experienced problems using certain de-archiving tools to unpack the GeistCM software (RAR) folder supplied with Computer Music Special 50. If this applies to you, please download an updated package from your FXpansion user account. Login to your account at www.fxpansion.com and go to Support/Downloads to find the link. If you are unable to handle a large (139MB) download, please email our disc support team (email@example.com) for an alternative solution. Apologies for the inconvenience.