Celemony has released Melodyne Editor version 2.1.2 with support for Mac OS X 10.9 Mavericks.
Celemony does warn that the update is only for Melodyne Editor. Melodyne Studio version 3.2 is not yet compatible with OS X 10.9 Mavericks.
According to Celemony, the update also improves the interaction of Melodyne with all DAWs. The Melodyne update can be downloaded by existing users from their myCelemony account.