Native Instruments DRUMS OverKILL Operation Manual page 44

Error Creating Folder / Access Denied: If you receive this error upon installation
of any NI product on Mac, then it is likely there is a permission problem. The
solution is beyond the scope of this guide, but the following link may help:
http://www.nativeinstruments.de/index.php?id=niosxtut_us
 – KONTAKT PLAYER 2