City were left fuming by Eden Hazard's controversial goal where he was wrongly allowed to dispossess David Marshall of the ball whilst the keeper was bouncing it.
Jose Mourinho - who was sent to the stands during the Blues' 4-1 win - accused Cardiff of being time-wasters after the match but Mackay insists he was not concerned by the Chelsea manager's comments.
The Scot pointed out that the Portuguese has previously been accused of time-wasting himself, including during the 2003 UEFA Cup final between Porto and Celtic.
"It doesn't really bother me in the slightest," said Mackay. "I am pretty sure it was borne out of the frustration at being sent off.
"I think when you look at four minutes stoppage time being held up, nowadays that is a pretty normal standard amount of time in the second half.
"You speak to the fourth officials and they tell you that it's 30 seconds for a sub, 30 seconds for a goal.
"There were three goals in the second half, and five subs. Everyone is the same in terms of that. When you are frustrated it is something else you might blame.
"I remember watching Porto play Celtic in the UEFA Cup final a long time ago, that allegation was labelled at him by Martin O'Neill at the end of the game. It is just something that is borne out of frustration at being sent off."
At the time O'Neill had said of Mourinho's team: "I will probably get into trouble for this, but it was poor sportsmanship. The rolling over, the time wasting."
"There is always a sense you feel you have been hard done by when you feel there is some sort of injustice that happens, but you have got to get it out of your head quickly," Mackay added.
Mackay said that whilst Norwich may not be title contenders like Chelsea, they will be tough opposition at Carrow Road.
"Now we face a side who I think have got experience throughout their team. They have invested again and there are guys who have played together for many years," he said.
"I think the atmosphere, the tight pitch, always make for a tough game at Carrow Road. I have never had an easy one and that included when I played there."