April to make his first league appearance, a game against Bristol City in which he scored his first goal for the club. The Blades were struggling however and at the end of the season were relegated from the Championship. With United now in League One McAllister was on the fringes of the first team squad making a handful of appearances in the first half of the season, predominantly in the various cup competitions during which he scored his only goal of the season against Burton Albion in the Football League Trophy. Making good progress he was rewarded with a contract extension in January 2012 to keep him at Bramall Lane until the summer of 2014. Immediately after signing his extension he was loaned out to League Two side Shrewsbury Town for a month to gain more first team experience, with Shrewsbury manager Graham Turner describing him as "a strong player who can put his foot in and who has a good shot on him". After a successful initial spell McAllister opted to extend his loan deal at the Shrews until the end of March, and with the move working out well it was agreed to extend his loan until 14 April, two weeks prior to the end of the season. McAllister was a regular starter for the Shrews during his time there, including playing in a home match against Port Vale which was abandoned after 64 minutes due to a fire at Greenhous Meadow, with Shrews 1–0 at the time. McAllister's impressive run was temporarily halted at the end of March when he incurred a red card, being controversially sent off against Aldershot Town. Shrewsbury Town tried to appeal against the red card to the Football Association (FA) using video evidence, but the appeal was rejected. This meant that McAllister's automatic three game ban stood, effectively ending his stay with the Shrews. McAllister returned to Bramall Lane as he wasn't able to play any more games for Shrewsbury that season. On his return to Sheffield, Blades manager Danny Wilson stated that McAllister had returned a "much better player" and sympathised with him over his controversial sending off which ended his loan spell at Shrewsbury. With the Blades still in League One, the start to the 2012–13 season saw McAllister finally break into the Blades first team. He began to make regular starting appearances and scored the only goal against his