Previously: VMware Fusion running WIN7. Already had Sentinal installed. updated DB yesterday and set up some favorites.
Today: got my 436 scanner. backed up the 4GB card in OSX. Copied files to a 16GB card. Used 16GB card in scanner. Scanner works.
Next: Ran VM, Opened Sentinal, used card reader for 16GB card, opened it in Windows. Sentinal sees 16GB card, Updated DB. (didn't update firmware), put card back in scanner.
IT WORKS!
I haven't tried plugging the scanner directly into my mac yet, but I don't have a problem with just using the MicroSD and a card reader.
On the next release of the firmware i will try an update, once there is an update log with changes.
THANKS EVERYONE, Hope this helps someone.