I’m considering my first portable GPS unit and this thread and others have proved to be very helpful. And thanks to flyinbob for the heads-up on the Consumer Reports review of GPS units.

Mrs. Cholula has had a built-in unit in her last few cars and I nearly always get a GPS unit in a rental car. But have never had one for my personal car.

I’m leaning toward one of the higher-end Garmin Nuvi or TomTom units and I have a question I don’t see answered here or elsewhere. To update the maps or POI via the internet, do these GPS units require a Windows OS? I’m a Mac guy and I know some of the earlier GPS units required a Windows machine.

Thanks.