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Chapter 15. Xcode Tools > The Developer Folder

15.2. The Developer Folder

After installing the Xcode Tools, a Developer folder is placed at the root level of Mac OS X (/Developer). Inside the Developer folder, you'll find a host of other folders that contain applications, documentation, sample applications (including their source code), and a suite of command-line utilities for development.


This folder contains everything a developer needs to build an application for Mac OS X. The two main applications within this folder are Apple's integrated development environment (IDE), consisting of:

Interface Builder

A tool used to construct the graphical user interfaces (GUIs) for Carbon or Cocoa applications. It's intended for use alongside Xcode, as described later.


Formerly known as Project Builder, Xcode is the central development environment for all Mac OS X applications.


This folder holds an immense amount of system documentation in HTML and PDF format, covering the entirety of Mac OS X from a developer's point of view. Topics range from general descriptions of system functionality to highly specific reference manuals, to the Cocoa and Carbon programming APIs. For more about the documentation the Xcode Tools offer, see Section 15.4.1.

All the documentation found in this folder also exists on the ADC web site, http://developer.apple.com.


The /Examples folder contains a variety of application project folders, organized by category. Some are .pbproj files and related Aqua interface and localization resources all ready for opening in Xcode, while others are simple shell scripts or AppleScripts that demonstrate various concepts.

The /Examples/Web Services folder, for example, contains a source to an application called XMethodsInspector, a couple of AppleScripts (embedded in shell scripts), and a couple of C++ source files. All show different ways of invoking SOAP and XML-RPC web services from your software.


This folder contains a set of palettes and index templates you can use with Xcode.


This folder contains FlatCarbon flat header files, which help developers port applications from Mac OS 9 (which had no concept of Frameworks—see Section 15.7 later in this chapter, for the difference). The FlatHeaderConversion folder holds tops and perl scripts to help you convert existing legacy source files' header invocations into Mac OS X-style #include directives. Either method will help you migrate older Macintosh codebases to Mac OS X, but the latter method results in code that compiles faster.


Headers and other resources used by Xcode's Cocoa-Java bridge (see the Java entry in Section 15.5).


Makefiles that Xcode transparently uses when building applications. Generally speaking, you can leave these as is.


Interface Builder (described in Section 15.6) uses palettes to hold the basic elements of GUI application interfaces: windows, controls, and views. When designing interfaces with Interface Builder, drag these controls off the available palettes and into the interface that you're designing.

This folder contains extra palettes beyond those built into Interface Builder.


This folder contains two command-line utilities, jam and pbhelpindexloader, which Xcode uses to perform different tasks when compiling code.


Command-line tools from Apple, useful for development or working with HFS+ filesystems.



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