The Ibrox gaffer has faced calls for his resignation in the aftermath of Sunday's embarrassing Ramsdens Cup defeat at the hands of Raith Rovers as disgruntled supporters have hit out at an abject display.
The champions have a chance to bounce back when they face Dundee United in their Scottish Cup semi-final tomorrow afternoon.
And Barca Bear MacDonald is confident the Gers boss still has the backing of the Light Blue legions.
He said: "I think [the criticism] is a bit unfair.
"When you play with Rangers, you expect to win every game, it doesn't matter the opposition.
"You are there to win. He has been getting stick for a while, not just after Sunday. The pressure is more on them.
"You have to give the kids time, they are learning with the big crowd and big games.
"That is what it is all about, you have got to handle it.
"The people I know, they want it to work and, until anything happens, he is your man.
Asked if Ally's status as a legend will buy him more time. he replied: "It could be.
"But that is not Ally's decision. It is in the hands of other people.
"The supporters have been with him and I hope they stay.
"If we get one goal on Saturday they will be singing and dancing again."
Meanwhile, Jon Daly is determined to dump his former club from the cup as he targets a second shot at a Scottish Cup winners' medal.
The striker was part of the Tannadice side that won the competition by beating Ross County in the final four years ago and will go head-to-head with a host of familiar faces at Ibrox tomorrow.
Daly was one of United's key men last season but Jackie McNamara's side still have one of the most impressive forward lines in Scotland.
And the Irishman is eager to add to his 25-goal haul so far this season and end the Arab's cup dreams at the semi stage.
He said: "You find at most football clubs that the dressing room is a great place to be and that was certainly the case when I was at Tannadice.
"The majority of clubs have a good bunch of players and United was no different but now my focus is on Rangers.
"I'd love nothing better than to score the winner and knock United out of the Scottish Cup.
"That's football and I want to get to the final and try to win the trophy with my team.
"I want to do that for my team-mates, myself and for everyone else involved with the club. It would be a fantastic achievement.
"To do that, we're going to have to knock out one of my former clubs. That would obviously be upsetting for them if it happened but it would be good for us."