hey dominik,
I have not been able to get the USB cable to work with a Mac. The only success that I have had is using a Bluetooth connection. Fortunately, my computer came built-in with Bluetooth, but unforturnately not all Macs did. I realize that the Datapilot is a bit pricing, but a simple USB Bluetooth adaptor may be a cheaper and better solution. Sorry I could not offer a direct solution, but I hope you are able to figure it out. Please let us know what you come up with.
Creeper