Macpherson fired rounds of 68-72-71-68 to finish at 9-under, thirteen strokes behind the winner American Nate McCoy who won the title with a 22-under-par total for a two stroke win over fellow American, Bobby Wyatt.
McCoy, a senior at Iowa State, shot a final-round 7-under 65 to edge Bobby Wyatt, who matched him with a 65 to take second position at 20-under-par. Third-round leader, Luke Guthrie, fired a 72 to finish third at 16-under-par.
It was McCoy's biggest win of his career to date with the world number 129th previous best performance a 3rd place finish at the 2010 Herman Sani Invitational.
As for the remaining five other Australians playing in Atlanta, Todd Sinnott had a solid start to his US campaign recording a top-20 finish with an 8-under-par total after rounds of 70-68-72-70 to be the next best Australian behind Macpherson.
Maverick Antcliff finished in a tie for 25th position at 7-under-par with rounds of 69-72-70-70, with hard working Tasmanian Kalem Richardson finishing out the Australian contingent that made the 3-under-par 54-hole cut with solid with rounds of 69-70-72-71 to finish at 6-under and for a tie of 31st position.
Daniel Bringolf and Brett Drewitt had more time on the range with Bringolf missing the cut by two strokes at 1-under-par and Brett Drewitt finishing at 1-over-par for the three rounds.
The Australian contingent will move to Bluffton, South Carolina, for The Players Amateur which boast one of the strongest fields so far this American season.
Four of the top seven players under the Scratch Player's world ranking have committed to play in the Players Amateur that starts this Thursday.
Leading the way is world number 2 England's Tom Lewis, who won the St Andrew's Links Trophy on the Old Course earlier this month. World Number 3 David Chung, a rising junior at Stanford and winner last year at the Western Amateur in Chicago is also in the field.
The Australian contingent at Bluffton also includes Matthew Stieger, Nathan Holman, Tim Hart who had a solid performance in the event last year with a top-10 finish, Tarquin Macmanus, Ryan McCarthy and Kiwi based Aussie, Ben Campbell who's coming off a foot operation after sustaining a toe injury earlier in the month.
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