A pitting knife assembly including a pitting knife mount and a pulley drive assembly coupled and configured to move the knife mount around a circular or substantially circular path, and a fruit pitting apparatus including such an assembly. During operation of the pitting knife assembly with at least one pitting knife mounted to the knife mount and a fruit conveying assembly positioned to convey fruit to the pitting knife assembly, the pitting knife can produce pitted fruit by moving into engagement with fruit conveyed by the conveying assembly (to pit the fruit) as the knife mount moves through a first portion of the path, and the pitting knife can then move out of engagement with (and away from) the pitted fruit as the knife mount moves through a second portion of the path.