Preheat the oven to 350 degrees F line a baking sheet with parchment paper. Whisk the flour, coffee, cocoa powder, baking soda and cinnamon in a medium bowl. Combine the sugar, butter, honey, vanilla and eggs in a large bowl with a mixer on medium-high speed. Reduce the mixer speed to low; beat in the flour mixture until just combined. Stir in the macadamia nuts with a wooden spoon.
Form the dough into two 3-by-8-inch logs on the prepared baking sheet, about 3 inches apart. Bake until browned, about 25 minutes. Let cool 10 minutes, then transfer to a cutting board. Cut into 1/2-inch-thick slices using a serrated knife.
Reduce the oven temperature to 325 degrees F. Arrange the slices cut-side down on the baking sheet; return to the oven and bake 20 more minutes, flipping the cookies halfway through. Let cool 10 minutes on the baking sheets, then transfer to racks to cool completely.
Melt the white chocolate chips in a heatproof bowl set over a saucepan of simmering water (do not let the bowl touch the water), stirring until smooth. Dip the biscotti partway into the melted chocolate, then roll in the coconut. Place on a baking sheet lined with fresh parchment; refrigerate until set, about 30 minutes.