Hi! I am trying to find information about creating and interacting with a 'virtual serial port' on both PC and Mac. I have found a lot of info on how to do this on the PC side, but nothing in Mac. On PC side there are various activeX controls, etc. My need is this: I have a off the shelf program I use that sends and receives commands via RS-232. It is cross platform and I use it on both Mac and PC. I want to be able to intercept these communications in another program running on the same system, modify or manipulate the data, then send it either back to the program, or to my external hardware on a real RS-232 port, or a USB=>serial on Mac. I do not want to use a kludgy hardware 'solution' such as a null model cable. Any suggestions? I have seen that I can possibly use the kernel to create a TTL serial 'socket?'. Thanks!