I've been working on this as a replacement for the exiting dmxusbpro object by Olaf Matthes, which I've been having problems with recently when using receive mode in Max 6. It's not a drop-in replacement, your patch may need some minor changes but it works basically the same way.
This object is built for OS X 10.5 and up, and provides support for every mode of operation of the DMX USB Pro hardware via the VCP drivers. No windows version yet, but I'm working on it. Help patcher included.
Please don't use for any shows. It's not yet guaranteed to be stable, although I haven't seen any crashes so far.