Was that native support, or was it based on OS 9 / Classic emulation? I know that the PowerPC versions of OS X (i.e. every OS X up to and including 10.5) supported running OS 9 software in a sort of emulation layer (though I don't remember if this was first-party or third-party; I do recall PowerPC Macs with OS X having a "Classic Mode" that booted into OS 9, however).
