With the two clubs agreeing a fee on Friday for the 24-year-old, and the move still not yet being rubber-stamped, it has turned the whole situation into bit of a transfer saga.
When the news broke last week that the Blades had accepted a bid from the Molineux club it caused unrest amongst Unitedites who were aghast about the fact that one of their better players was having a medical in the West Midlands.
It has since developed that the Blades "couldn't really stop" McDonald from speaking to Wanderers, as it emerged they activated a clause in the Scot's contract which allowed him to hold talks with United's League One rivals.
SUFC then declared that 'there is a verbal agreement between David Weir and Kevin McDonald that the player will speak to Sheffield United before committing his future elsewhere.'
Amidst all of this, McDonald didn't feature for United in their 3:1 loss at Brentford at the weekend.
However, speaking on Wolves' official website on Monday, manager Kenny Jackett has indicated that a deal is close to being agreed, despite United's efforts to retain their key player.
Jackett said: “It should be completed by midweek, by Wednesday. I have liked him for a while.
“He has good stature and gives good presence and he’s a ball player. He’s two-footed and hopefully he will give us some goals from midfield.
“He will bring composure to our midfield with so many youngsters here.”
United have made no further statements on the situation since the one they published on Friday afternoon.