Career
He has also played for Aberdeen and during his time there spent time at Greenock Morton and Alloa Athletic on loan. McManus made his debut for Aberdeen"s first team on 28 April 2012, coming on as a substitute in a 3–0 defeat to Dunfermline Athletic. In the new season, McManus goalscoring form in the U20 league caught the eye of Dundee and Partick Thistle, who were keen to sign him on loan.
In November 2012, McManus signed a new contract with the club that will keep him until 2015.
On July 31, 2013, McManus joined Alloa Athletic on a six-month loan deal. McManus moved on loan to Scottish League One club Greenock Morton on 8 August 2014.
He scored his first ever senior hat-trick in a 5–2 cup victory over Berwick Rangers in August 2014, and left the club at the end of his loan spell having scored 12 goals in 21 starts. On 2 February 2015, McManus joined Greenock Morton for a second loan spell, signing until the end of the 2014-2015 season.
McManus was nominated for the SPFA League One player of the year for 2014-2015, as well as being included in the League One Team of the Year with team-mate Mark Russell.
On 15 May 2015, McManus signed a pre-contract agreement with Fleetwood Town. On 31 December 2015, McManus returned for his third loan spell with Morton. Having represented Scotland in U18 and U19 Levels, McManus was called up for the U21 squad.