The first half was littered with chances for both sides. Veteran striker Steve Claridge shot over for the home side after four minutes, and then Johnson had a header cleared off the line as Steve Guppy's deliveries caused chaos in the Silkmen's defence.
Macclesfield, having weathered the early storm, started to find their feet. Parkin struck the bar with a 20-yard shot after 17 minutes, and then 10 minutes later a frantic goalmouth scramble ended with a shot cleared off the Wycombe line.
The home crossbar was also struck, but it was Jon Parkin who broke the deadlock. Taking the ball on his chest with his back to goal 20 yards out, he turned Stuart Nethercott and fired the ball into the bottom left-hand corner after 36 minutes.
The home side, after a period of sustained pressure, equalised after 55 minutes. In the first 10 minutes of the second half Macclesfield had cleared the ball off the line three times, but it was Roger Johnson who placed his header beyond Alan Fettis, before celebrating in front of the away dugout.
Both teams then had chances, and the home side also had a flurry of corners without managing to find the killer delivery.