The Scot has enjoyed an advanced role in the side under the new regime in pre-season, playing just behind the striker.
In his previous two seasons in a Blades shirt the 24-year-old featured in central-midfield alongside captain Michael Doyle, but the arrivals of Conor Coady and Stephen McGinn means that they can ably deputise the position McDonald has vacated.
Macca, who is likely to star in his new position tonight against his former employers Notts County, said:
"It's been nice. The manager has come in and put me in that position and you feel more free; he just wants you to go out there and express yourself further up the pitch and that's what we've all been doing up that top area.
"The manager wants me in that area to try and create things more because obviously I'm usually further back and it's massively different but it's been good and I'm just buzzing to get the season started in that new position."