Massachusetts General Laws Part II. Real and Personal Property and Domestic Relations (Ch. 183-210) Ch. 190B, § 2-502

(1) in writing;

(2) signed by the testator or in the testator's name by some other individual in the testator's conscious presence and by the testator's direction; and

(3) signed by at least 2 individuals, each of whom witnessed either the signing of the will as described in paragraph (2) or the testator's acknowledgment of that signature or acknowledgment of the will.