Unfortunately the only multi serial port unit that works with a Mac is the Keyspan 4 at about 80.00. Don't know why they don't make a dual one as that's what I need.

I heard that VMWar.e is more robust and is a reason I haven't upgraded to the new version of Parallels.

Both good suggestions that don't help me at the moment. Ya never know,,, I may end up doing just that in order to make it work.

If you know of a good dual serial to 2 USB that is self powered and works with a Mac. please let me know.

The only time I run the PC side of the computer is for Sailmail. Wish there was a OX version of Sailmail. I've got both Keyspan adaptors working on the Mac side, it' the conversion to PC that needs work.