Delorme’s web site lists a Mac mapping program but doesn’t show it as the 2003 version. It also shows this version as currently "SOLD OUT".
Their "Street Atlas 2003 PLUS" seems to have the flexibility to easily add in your favorite locations (like Roadfood stops). I’m going to have to check it out.
The regular "SA 2003" shows a $45 price, the "SA2003PLUS" shows $95.