Macclesfield 1-1 Plymouth
George Donnelly scored with the last touch of the game to earn Macclesfield a point at home to Plymouth.
The visitors went ahead when Conor Hourihane, who had earlier gone close with a 25-yard effort, lashed a volley through a crowded box from 15 yards.
With seconds left on the clock, Donnelly converted a Marcus Marshall cross with his head.
Plymouth are a point clear of the drop zone in 21st, with Macclesfield three points and a place better off.