In a large bowl, cream together the butter and sugar until smooth. Beat in the eggs one at a time, then stir in the vanilla and sour cream. Combine the flour and baking soda; stir into the creamed mixture until well blended. Use a wooden spoon to stir in the coconut and macadamia nuts. Drop dough by rounded teaspoons 2 inches apart onto ungreased cookie sheets.
Bake for 10 to 12 minutes in the preheated oven, until edges are golden brown. remove cookies from baking sheets to cool on wire racks.
