Yes, I stand corrected: for those using OS X, apparently some of the Sony disks are installing two kernel extensions, which may cause problems similar to the ones experienced by Windows users. It's in the link provided by 12rounds in the copyright forum and by lmacken in post 42. There is no security alert, but I don't know if the license agreement discloses what the two kernel extensions do, or what the "Start.app" does.