Preheat the oven to 190 degrees C. Sift together the flour, bicarb soda and salt; set aside.
In a medium bowl, cream together the butter, brown sugar and white sugar until smooth. Beat in the eggs one at a time then stir in the vanilla. Gradually blend in the sifted ingredients. Mix in the white chocolate and dark chocolate chips and macadamia nuts. Drop by rounded tablespoonfuls onto ungreased baking trays.
Bake for 8 to 10 minutes in the preheated oven or until golden brown. Allow biscuits to cool on baking tray for 5 minutes before removing to a wire rack to cool completely.