He previously played for the Leeds Rhinos in the Super League, Leigh Centurions in the Championship, Sydney Roosters, Gold Coast Titans, St George Illawarra Dragons, North Queensland Cowboys and the Cronulla-Sutherland Sharks in the National Rugby League, the Northern Pride RLFC and the Norths Devils in the Intrust Super Cup, the Wyong Roos and the Newtown Jets in the NSW Cup and the World All Stars at representative level.

Born in Port Moresby, Papua New Guinea, Macdonald moved to Queensland, Australia at a young age and played his junior football for the Cairns Brothers, before being signed by the Gold Coast Titans.

[19] In Round 1 of the 2017 NRL season, Macdonald made his club debut for the St George Illawarra Dragons against the Penrith Panthers, playing on the wing in the 42-10 win at Jubilee Oval.

[22] In round 1 of the 2019 NRL season, Macdonald made his debut for North Queensland, scoring a try in their 24–12 victory over his former club, the St George Illawarra Dragons.

[24] On 20 June, he was involved in a traffic incident, in which a hired car leased in his name was found damaged and abandoned on Magnetic Island.

[29] Macdonald joined the Norths Devils and played four games for the Queensland Cup club, including their 16-10 grand final win over the Wynnum Manly Seagulls.

[34] On 3 October 2022, Macdonald scored try in the Million Pound Game victory over Batley which saw Leigh promoted back to the Super League.

[35] On 17 November 2022, Macdonald joined Leeds Rhinos from Leigh for the 2023 season with a pre-season friendly being announced as part of the deal.

[37] Macdonald played a total of 19 games for Leeds in the 2023 Super League season as the club finished 8th on the table and missed the playoffs.

[56] In 2022, Macdonald was selected for the Papua New Guinea Squad at the delayed 2021 Rugby League World Cup in England.

Macdonald started the group stage matches against Tonga,[57] Wales,[58] and Cook Islands,[59] as well as the quarter-final loss to England,[60] but failed to register any points.