Cardiff have enjoyed a few notable highlights in their maiden Premier League campaign, including victories over Manchester City and Welsh rivals Swansea City.
The Bluebirds fought back to draw 2-2 with Manchester United at the weekend, leaving Mackay delighted after another performance which showed they could compete at the highest level.
And Mackay does not believe it will be too long before Roy Hodgson starts to consider some of the 14 English players in the Cardiff squad.
"Ben Turner and Steven Caulker at the back were sublime," Mackay said, quoted in the Daily Star.
"You look at Caulker, Turner, Fraizer Campbell and Peter Whittingham, there is young English talent there playing at Premier League level.
"If they play consistently well, that's when the net that is cast wide to find English talent in the Premier League may glance down on them.
"We knew we were playing the champions and they knew they were playing a team who are committed and have shown evidence we can compete at this level.
"Our first-half performance was arguably our most complete performance of the season so far."
Peter Odemwingie, who joined from West Brom in September, has also expressed his pride at Cardiff's display against United.
The Nigerian said: "Cardiff are here to stay. That's the first thing that came into my mind when we equalised and I saw the joy around the stadium.
"To create the chances we did means we can be proud of our performance."