FYI, I will be developing iPhone Apps only and don't want to install unnecessary things. Options are: Developer Tools Essentials (Required.) iPhone SDK (Obviously need.) System Tools (Do I need? It's checked by default.) UNIX Development Support (Do I need? It's checked by default.) Mac OS X 10.3.9 Support (Know I don't need, not developing anything for OS X, particularly not an old version.) WebObjects (Do I need? It's NOT checked by default.) Thanks.