 After shakedown off Cuba, "MacKenzie" returned to Boston, Massachusetts on 15 September 1945 and subsequently participated in the Navy Day celebrations on 27 October at Savannah, Georgia She served with the Operational Development Force at Norfolk, Virginia, her home port, and conducted training exercises and escort duties along the Atlantic seaboard until sailing on 5 January 1948 on a goodwill tour to Buenos Aires, Argentina.