Have just bought a Navman S30 3D.
I use a iMac Intel Core 2 Duo.
I have Crossover software that enables the use of a limited range of Windows based items.
In attempting to download the NavDesk Application and the Map Date from the supplied CD, it appears to go through the process but finally I get the message that Installation has failed.
Do I need to get a version of Windows plus suitable conversion software to succeed?
The best thing to do is to contact Navman (don't hold your breath) and see if they have the software for the IMac, or go back to the place you bought the GPS from and ask them for compatible software.
Navman S30 3D with Crossover software
