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A full suite of free developer tools is available to Mac OS X developers, who can speed up their development process by using these tools to prototype, compile, debug, and optimize their software products. Xcode, Apple's integrated development environment, can be used with Cocoa, Carbon, or Java. Apple also provides a wide selection of open source tools, such as GCC.

A guided introduction for developers new to Mac OS X developer tools.   Essential information for developers using the Xcode software development tool set.  
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AppearanceSampleUpdated (HTML) (DMG) (ZIP)
Sample Code for the WWDC 402 Adopting Xcode Hands-on session.
Xcode 2005-06-27
Birthdays (HTML) (DMG) (ZIP)
Dashboard widget with a plug-in that queries AddressBook.framework for contacts with upcoming birthdays.
Xcode 2008-09-10
BlockAnimation (HTML) (DMG) (ZIP)
A bit of java code which INCORRECTLY handles animation
Java 2006-08-01
ButtonMadness (HTML) (DMG) (ZIP)
Demonstrates how to use the various types of buttons using a nib file or programatically.
Interface Builder 2007-10-30
CxxNewDelete (HTML) (DMG) (ZIP)
How to override the C++ 'new' and 'delete' operators.
Compiling & Debugging 2006-10-03
Fractal Performance (HTML) (DMG) (ZIP)
Three fractal applications that show various bottlenecks and how they can be fixed.
Java, Performance 2006-04-17
IBFragmentView (HTML) (DMG) (ZIP)
Illustrates building an Interface Builder plugin including a custom inspector and library integration for a custom view.
Interface Builder 2006-08-01
Installer Tiger Examples (HTML) (DMG) (ZIP)
A walkthrough of using distribution scripts and other Tiger Installer features.
Files & Software Installation 2005-06-01
InstallerPluginSample (HTML) (DMG) (ZIP)
Provides instructions for extending software installation using custom plugins
Files & Software Installation 2006-08-30
iSync Sample Document (HTML) (DMG) (ZIP)
iSync Plug-in Maker sample document, illustrating how to build an iSync plug-in for a SyncML phone.
Syncing 2006-08-01
JDragNDrop (HTML) (DMG) (ZIP)
Deprecated - Demonstrates building a simple view to implement Drag-and-Drop functionality in Cocoa-Java.
Java 2003-01-14
MachPortDump (HTML) (DMG) (ZIP)
Dumps out the Mach port name space of a process; useful when debugging port right leaks.
Compiling & Debugging 2005-08-10
ManagedObjectDataFormatter (HTML) (DMG) (ZIP)
A Data Formatter for Xcode 2.0 and 2.1 that displays NSManagedObject * variables.
Compiling & Debugging, Xcode 2005-06-01
MoreAppleEvents (HTML) (DMG) (ZIP)
Provides routines that assist with the creation and sending of Apple events and object descriptors.
Scripting & Automation 2003-01-14
Moving To GCC 4.0 (HTML) (DMG) (ZIP)
Shows how to fix code that GCC 3.3 accepts but GCC 4.0 doesn't.
Compiling & Debugging 2005-06-01
MyFirstJNIProject (HTML) (DMG) (ZIP)
A Java application that calls the Address Book framework through the JNI
Java 2006-04-12
ODOC (HTML) (DMG) (ZIP)
Illustrates how to send an open document ('odoc') Apple event to another application process.
Scripting & Automation 2003-01-14
PIDFromBSDProcessName (HTML) (DMG) (ZIP)
Provides a simple API to do process PID lookup based on BSD process name.
Darwin 2003-02-13
QCFundamentals (HTML) (DMG) (ZIP)
Demonstrates Coordinate, Interpolation, and Iterative systems in Quartz Composer with an amusing animation
Graphics & Imaging 2006-08-07
QCGalaxy (HTML) (DMG) (ZIP)
Demonstrates use of Particle Systems and Core Image Filters in Quartz Composer
Graphics & Imaging 2006-08-07
Quartz Composer WWDC 2005 Composition (HTML) (DMG) (ZIP)
Shows how to build a parameterized motion graphics composition with Quartz Composer.
Graphics & Imaging 2005-06-01
Reminders (HTML) (DMG) (ZIP)
Dashboard widget with a plug-in that displays upcoming iCal events, to do items, and calendars.
Dashcode 2008-07-25
ScriptBuildPhases (HTML) (DMG) (ZIP)
Augmenting Project Builder build phases with scripts to do extra work or invoke other tools.
Xcode 2003-01-14
ScriptView (HTML) (DMG) (ZIP)
Shows how to build a script editor application with a built-in script database using AppleScript Studio.
Scripting & Automation 2005-06-01
SDKExample (HTML) (DMG) (ZIP)
Shows how to weak-link against the Carbon framework in various SDKs to adopt new OS features in a single executable.
Xcode 2005-06-06
simpleJavaLauncher (HTML) (DMG) (ZIP)
How to launch 1.4.x and future JVM's from a Core Foundation tool.
Java 2006-04-12
SimplePing (HTML) (DMG) (ZIP)
Sample provides simple API to programatically ping a remote host without admin privileges
Darwin 2003-10-27
Sproing (HTML) (DMG) (ZIP)
Shows how "springs" work to control view resizing behavior.
Interface Builder 2003-05-20
TemperatureTester (HTML) (DMG) (ZIP)
Shows how to add a simple Unit Test to Temperature Converter.
Xcode 2005-06-06
Test64BitMultiprec (HTML) (DMG) (ZIP)
Implements (PPC) A*Y+B where A & B are arrays of 64-bit words and Y is a 64-bit integer
Performance 2006-06-09
UpdateXcodeSubprojects (HTML) (DMG) (ZIP)
Updates all subprojects of an Xcode project to Xcode 2.1 format. Illustrates scripting techniques.
Scripting & Automation, WebObjects, Xcode 2005-06-06
WcharDataFormatter (HTML) (DMG) (ZIP)
An example of how to write a custom data formatter.
Xcode 2006-03-31
XcodeClientServer (HTML) (DMG) (ZIP)
Demonstrates how to manage multiple projects using new Xcode features.
Xcode 2005-06-06