...wel, sort of. I wrote a small program called "SerialClient" that connects to a named socket that Parallels creates and passes the data through a Keyspan USB to serial adapter to an RS-232 device. SerialClient can also log the transfered data so you can analyse the serial protocol. You can download SerialClient from: http://eudyptes.com/SerialClient.php Note that this is still beta software. Usual disclaimers apply.