Nonsens! We are not talking about Windows only hardware. We are talking about hardware that is connected to and supported by OSX! There is nothing special on USB. USB is more common and better defined than serial. Als there is no way to attach a serial device to an iMac! Also I know of no software of this type that does not support hardware. As a closer let me quote from Parallels site: "mproved USB performance and broader device support". Also this is RC 2 I rest my case!