Originally Posted by dweezel
You need OSX 10.5 or better to install.(leopard , or snow leopard)
I haven't upgraded yet, bummer.
Leopard has been out for over 2 years, and it was a fairly major change from 10.4. Significantly more than from 10.5 (Leopard) to 10.6 (Snow Leopard).
Snow Leopard is only $29 from the online apple store.
Edit: Oops that's only if you already have 10.5. 10.4>10.6 upgrade is $169.