To move around Menorca, rent a car is the best option. The roads are well marked and traffic is quiet and safe. To reach coves (Macarella, Pregonda, etc..) the car is essential, as with the buses you will only reach the urbanized beaches .
In such a small island with a car you know every corner in just one week.
See the wide range of companies and choose the option that suits you. Booking in advance will get the best price.