Blimey! Only 2 weeks and I've already messed up OS X 10.4.11 (Tiger). I've installed XCode that comes with this OS and Terminal launched successfully. A few days later I tried to install iPhone SDK for Leopard (hey I tried) and it failed; giving me some kind of error that the my system didn't support it and that some components (library?) would install. This is my very first Mac and I need your help, please. OS X 10.4.11 on TiBook PPC 667Mhz G4.