Impossible d’afficher votre position géographique

Hi,

I'm using an iMac Retina on Yosemite connected to the net by RJ45.

When I try to plan an itinerary with Plans, the app can't get my position (in french "Impossible d’afficher votre position géographique").

Why the app can't get my static position using my home address ? Like on iOS ?

Regards,

Nico