Mac's Shack is all about the pure goodness of the season's local harvest. Your taste buds will shout “hello summer!” Ice cold Wellfleet Oysters, tender lobster dripping with butter, mouthwatering sushi, and the freshest seafood served on the Cape – made exactly how you like it. This is the kind of food that makes you happy. Serving sushi, raw bar, cocktails & coastal cuisine in the heart of Wellfleet. Indoor & Outdoor Dining with water views.