The score came at the end of a nine play, 80-yard drive. Skon completed 5 of 5 passes on the drive for 92 yards, including a pair of passes to Macari, who finished the day with seven grabs for 71 yards.
Skon was 19-of-29 passing in the game for 231 yards and the score.
Macari's touchdown put Georgetown (5-5, 2-2 Patriot League) up 10-0 following Matt MacZura's 20-yard field goal in the first quarter.
Bucknell's Sean Cobelli hit a 37-yard field goal in the fourth quarter, ending the Hoyas' shutout bid.
The Bison (2-8, 0-5) managed just 168 yards of offense and seven first downs to Georgetown's 22.
The win snapped a four-game losing streak in the series for Georgetwon.
Ben Grogan 43 yd FG GOOD
Trent Domingue 25 yd FG MISSED
Aaron Bailey threw for three touchdowns and Tyvis Smith rushed for 147 yards and a score to lead Northern Iowa to a 53-17 win over Eastern Illinois in the FCS playoffs on Saturday night.
Leonard Fournette run for 23 yds to the TexAM 13 for a 1ST down
J.W. Walsh run for a loss of 4 yards to the OKSt 33