This move to the League One club represents a step up for the Droylsden-born striker, given he spent the second half of last season in a lower division with Newport County.
McNeill featured 15 times for the South Wales outfit, scoring two goals - including his first in senior football, when he netted in a League Two win at Tranmere Rovers in March.
That stint added to the experience he gained with United last term, as he joined some of his 2022 FA Youth Cup-winning team-mates in becoming a regular starter for our Under-21s.
McNeill also made his senior debut for the Reds in 2022/23, as the first Academy player to achieve that landmark moment under Erik ten Hag.