The news is a major shock from the All Blacks, given the professional relationship between Robertson and MacDonald.
When Robertson first applied for the All Blacks head coaching role in 2019, MacDonald was one of his assistant coaches. Four years later, that partnership was reunited, as Robertson was confirmed to succeed Ian Foster as All Blacks head coach.
Before that, the pair was also part of the New Zealand Under-20s side in 2015.
However, just five tests into the Robertson era, MacDonald has opted to not continue with the side.
As a result, MacDonald’s portfolio as attack coach will largely be filled between defence coach Scott Hansen, backs coach Jason Holland, and contact skills coach Tamati Ellison.
Speaking to media before his side travels to South Africa, Roberston outlined the reasons why the decision has been made.
“Just a little bit of philosophy on rugby, how it’s played,” he said.
“We just didn’t quite click in different aspects.
“There was no intent to get to this point where we are now. But we just believed for the both of us, the best thing for the All Black group is we make the call now.
“We went through a process, and we got to here.”
Naturally, given the swift nature of the move, the All Blacks and New Zealand Rugby have been quick to assert there is nothing sinister behind MacDonald’s exit.
However, it does threaten to be a huge disruptor to the All Blacks, just a week out from arguably their toughest ask of 2024.
And given a large contingent of the current All Blacks squad have worked with MacDonald at the Blues, Robertson and his coaches are making sure the players are looked after given the nature of their former boss’ exit.
“We had a conversation this morning,” Robertson continued.
“The coaches respect and care for Rangi [MacDonald].
“The big thing for us is our focus heads to South Africa now. We’ve had the conversations that have been required with the players.
“You have a job and a role, and I believe this is the best thing for our group moving forward.
“He’s a hell of a coach, he’s done a good job with the Blues.
“I wish him all the best, like I said, he’s a good man and a good coach.”
Alex Powell is an Online Sports Editor for the NZ Herald. He has been a sports journalist since 2016, and previously worked for both Newshub and 1News.