Here, from the Apple Store, are the minimum requirements for iPod use on a Mac:iPod shuffle - Mac OS X v10.4.8 or later iPod nano - Mac OS X v10.4.8 or later iPod classic - Mac OS X v10.4.8 or later iPod touch - Mac OS X v10.4.10 or laterIn other words, you need Tiger or Leopard. But why? These iPods can be used under Windows, so they aren't dependent on Mac OS X-only features. What do they require that is in only Tiger or later? It's not an issue for me, but a Mac user I know discovered that he couldn't use his new iPod nano on his Mac mini with Panther, even though the iPod worked on his PC, and he challenged me to explain the technical reason why Apple didn't maintain compatibility with older OS software. And, he reasoned, if iPods work under Windows, how could it be harder to support Apple's own (older) operating systems?