Macontosh mapping software

Getting ready to retire my old, trusty laptop with DeLorme Street Atlas
4. Is there a decent Macintosh program out there anymore?

Decent maps a must, points of interest not so much.

Routing OK, but I prefer to think for myself.

Interface with a GPS is nice but not essential. My III is still going
strong with almost 4000 hours of use.

Really don't want to have to buy virtual PC and foll around with
forground and background tasking.

Thanks in advance.

MAH
.