(adsbygoogle = window.adsbygoogle || []).push({}); i need to upgrade my 2 mac ibook g4's to the latest os out now but i only know how to upgrade and dump windows based pcs and laptops

Mac OSX Lion and Mac OSX Snow Leopard are not compatible with the iBook G4's because they have PowerPC processors which Apple dropped support for with Snow Leopard. Therefore, the maximum OS you can install on them is Mac OSX Leopard.