Career
Mackensie made her senior international debut for Denmark in August 1983, playing in a 2–1 friendly defeat by Sweden in Mellerud. In the quarter final against Germany, Mackensie scored a penalty kick to equalise Bettina Wiegmann"s opening goal and force extra time. Heidi Mohr scored the winning goal for Germany with two minutes left in extra time.
Mackensie inherited the national team captaincy after the World Cup.