There are two types of Yo-Yo adaptors:

- The one that shipped with Clamshell iBooks and Pismo PowerBook G3s

- The type that shipped with iBook G3 (dual USB) and TiBooks

Both of them are the same electrically, but the one that shipped with TiBooks has a different connector, the connector used on all later PowerBooks and iBooks up until the release of the MacBook Pro, and will not work.