Here is the reply I got from Silicon Labs (I'm also sending this to Custom Idea so they are aware):
Not sure they understood what I meant when I described my problem but I did link the proper product in the ticket... lets see what happens...Hello,
Thank you for contacting Silicon Labs support.
The drivers we supply work with 10.6 32 bit OS. We are hoping to have 64 bit support as early as the end of this week barring any issues during testing.
Regards,
Craig
Below is a summary of your request:
Ticket ID : MCU-4715
Components : USB to UART
Part Number : CP2101
Support Request : CP210x on OS 10.6.4 not working
Priority : Blocker
In the meantime, my problem remains... "cannot identify the dive computer" from Macdive... any help would be appreciated.