Aberdeen may be in the Premiership bottom six but they proved they are capable of being in the mix near the top.
The Reds went toe to toe with defending champions Celtic and carried an attacking threat.
Ultimately it was the failure to convert that play into goals that cost the Reds.
That has been the story of the campaign so far as in seven Premiership games the Reds have netted just five goals.
The emergence of on-loan Manchester United striker James Wilson after a recent hamstring injury at least brings a threat.
No goals but Aberdeen came to Parkhead with the intention to win. There was no notion of parking the bus – instead McInnes wanted to drive a bus through a Celtic defence that had looked vulnerable this season.
It nearly paid off as only a goal-line clearance and superb Craig Gordon save denied the Dons.
The Reds could not secure back-to-back wins at Parkhead for the first time since 2004 but they threatened to do it.
Ironically Aberdeen probably played better in this game than in the 1-0 win in May but still left empty handed.
This was a high pressure game for defending Premiership champions Celtic after suffering their worst league start in 20 years.
Aberdeen’s endeavours deserved a return from Parkhead but the harsh reality is they are now 10 points behind leaders Hearts after just seven games.
They must return to winning ways to slash that difference.
Celtic created the first opportunity in the second minute when James Forrest shot wide from 15 yards. Next Niall McGinn drilled a powerful low effort inches wide from the edge of the box.
The woodwork denied Celtic in the 25th minute when Odsonne Edouard’s curling 25-yard effort beat diving keeper Joe Lewis only to crack off the post.
Celtic were denied a strong penalty claim when Scott McKenna took out Edouard in an accidental coming togeher of the two players.
Edouard came off worst and eventually went off injured to be replaced by eventual match winner Sinclair.
The influential Mackay-Steven drove at goal and waltzed past two challenges inside the penalty box only to be denied. Keeper Gordon stuck out his left leg to superbly divert his shot wide.
From the resultant corner Wilson powered in a header that beat Gordon but Leigh Griffiths was on the line to clear.
In the 48th minute Lewis pushed a low drive from Callum McGregor wide for a corner.
Moments later Wilson collected the ball on the right, turned sharply and curled in a 25-yard shot that Gordon dived to push wide with his left hand.
Aberdeen were becoming increasingly influential and Celtic more frustrated. Which is why to concede while in the ascendancy will have been infuriating for boss Derek McInnes.
Celtic went ahead in the 63rd minute when a ball from James Forrest into the box took a deflection off Considine that sent it spinning up into the box.
Substitute SINCLAIR used improvisation and awareness to back-heel the ball into the net from six yards.
When that goal went in the Hoops’ anxiety at their recent poor form evaporated.
But the Reds were still very much in the contest.
They should have equalized in the 75th minute when Mackay-Steven whipped in an intelligent free-kick towards the on-rushing Mikey Devlin but with the goal beckoning the defender volleyed it wide.
In injury time Griffiths clearly tugged at Devlin’s shirt on the left wing to haul him back and gain an advantage to home in on goal. The ref bizarrely let play continue as the Celtic striker raced on then chipped wide of the advancing Lewis.