78 mins
Langfield blocked Garry Hay's fierce drive and Mark Kerr was on hand to clear the rebound.
The Dons keeper then misjudged a long ball into the box, allowing Old to win an aerial challenge and send a header onto the top of the bar and out.
Aberdeen
moved to the other end and Charle Mulgrew's inswinging
free-kick picked out Paton, whose shot was tipped onto
the crossbar by Brown.
As half-time approached, Conor Sammon's angled drive was blocked by the legs of Langfield.
The Aberdeen goalie was required to claw away an awkward Hay free-kick before Sammon missed an excellent chance to give Killie the lead.
David Fernandez raced into the box and centred to the unmarked Irishman seven yards from goal but the forward mis-hit his shot and Langfield blocked before the ball bounced out.
At the other end, Pawlett almost punished a mistake by Old but the midfielder's shot failed to trouble Brown.
Sammon's pursuit of a goal continued to prove fruitless as his curling shot beat Langfield but also cleared the far post.
Allan Russell replaced Fernandez to make his first appearance of the season and made an instant impact by setting up the opening goal.
The former Airdrie forward's pass was driven powerfully under the body of Langfield by Danny Invincibile.
Aberdeen immediately pressed for a leveller and Chris Maguire's shot was well saved by Brown.
Sammon failed to connect properly with Invincibile's cross and Killie were made to pay for that miss as the Dons restored parity.
Brown failed to deal with Mulgrew's free-kick and McDonald was on hand to score his first goal of the season.
Both sides came close to grabbing a winner in the closing stages with Langfield making a crucial block from Russell's attempt and Brown once again foiling Maguire.
Sandy's Match Pic's are HERE
