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Cocoa is an object-oriented application environment designed for developing Mac OS X native applications. The Cocoa frameworks support rapid development and high productivity. Cocoa provides developers starting new Mac OS X projects the fastest way to full-featured implementations. Applications from other platforms can also be brought to Mac OS X quickly using Cocoa.

A guided introduction and learning path for developers new to Cocoa.   Essential information for developers using Objective-C.   Objective-C API references organized by framework.
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Launch Time Performance Guidelines (HTML) (PDF)
Guidelines for improving the launch performance of an application.
Performance 2006-04-04
Low-Level File Management Programming Topics (HTML) (PDF)
Explains the low-level ways Cocoa applications can interact with files.
File Management 2009-03-05
Mac OS X ABI Function Call Guide (HTML) (PDF)
Describes the function-calling conventions used in the architectures supported by Mac OS X.
Intel-Based Macs 2009-02-04
Mac OS X Printing System Overview (HTML) (PDF)
Introduces Apple's printing architecture. Includes a road map for developing software.
Printing 2006-02-07
Mac OS X Technology Overview (HTML) (PDF)
Introduces Mac OS X and its technologies.
Accessibility 2008-10-15
Matrix Programming Guide for Cocoa (HTML) (PDF)
Explains how to use Cocoa matrices.
User Experience 2006-11-07
Memory Management Programming Guide for Cocoa (HTML) (PDF)
Explains how to allocate and deallocate objects in Cocoa.
Design Guidelines, Objective-C Language 2009-05-06
Memory Usage Performance Guidelines (HTML) (PDF)
Guidelines for improving the performance of memory-related code.
Performance 2006-06-28
Model Object Implementation Guide (HTML) (PDF)
Describes issues relating to the design and implementation of model objects
Design Guidelines 2008-02-08
Notification Programming Topics for Cocoa (HTML) (PDF)
Explains how to send and receive information about events in Cocoa programs.
Design Guidelines, Events & Other Input 2007-05-03
NSNetServices and CFNetServices Programming Guide (HTML) (PDF)
Describes how to implement Bonjour in Cocoa or Carbon applications.
Networking 2008-10-15
NSPersistentDocument Core Data Tutorial (HTML) (PDF)
Step-by-step instructions for building a simple but functionally rich application using NSPersistentDocument and Cocoa bindings.
Data Management, Design Guidelines 2009-02-04
NSPersistentDocument Core Data Tutorial for Mac OS X v10.4. (HTML) (PDF)
Deprecated - Step-by-step instructions for building a simple but functionally rich application using NSPersistentDocument and Cocoa bindings.
Data Management, Design Guidelines 2009-02-04
Number and Value Programming Topics for Cocoa (HTML) (PDF)
Explains how to use Cocoa object wrappers for primitive C data types.
Data Management 2008-02-08
Object-Oriented Programming with Objective-C (HTML) (PDF)
Describes object-oriented programming from the perspective of an Objective-C developer.
Design Guidelines, Objective-C Language 2008-11-19
The Objective-C 2.0 Programming Language (HTML) (PDF)
Introduces object-oriented programming and describes the main programming language used for Cocoa development.
Objective-C Language, Tools 2009-05-06
Objective-C 2.0 Runtime Programming Guide (HTML) (PDF)
Describes the Objective-C 2.0 runtime support library.
Objective-C Language, Runtime Architecture 2009-02-04
Online Help (HTML) (PDF)
Explains how to add help to a Cocoa application.
User Experience 2006-06-28
Outline View Programming Topics for Cocoa (HTML) (PDF)
Explains how to use Cocoa outline views.
User Experience 2006-06-28
Pasteboard Programming Topics for Cocoa (HTML) (PDF)
Explains how to transfer data using pasteboard operations in Cocoa.
Events & Other Input, Interapplication Communication, User Experience 2007-07-13
PDF Kit Programming Guide (HTML) (PDF)
Introduces basic PDF concepts and describes how to use PDF Kit to display PDF documents in your application.
Graphics & Imaging 2007-12-11
Performance Overview (HTML) (PDF)
Introduces the factors that determine performance.
Performance 2006-10-03
Predicate Programming Guide (HTML) (PDF)
Describes how to specify queries in Cocoa.
Data Management, Design Guidelines 2009-05-06
Preference Panes (HTML) (PDF)
Explains how to create dynamically loaded plug-ins that provide a graphical interface to user preferences.
User Experience 2006-10-03
Printing Programming Topics for Cocoa (HTML) (PDF)
Explains how to support printing in Cocoa applications.
Graphics & Imaging, Printing 2006-06-28
Progress Indicators (HTML) (PDF)
Explains how to use Cocoa progress indicators.
User Experience 2002-11-12
Property List Programming Guide (HTML) (PDF)
Explains how to use structured, textual representations of data in Cocoa.
Data Management 2008-11-19
Providing PDF Workflow Options in the Print Dialog (HTML) (PDF)
Installation information and examples, including the use of Automator workflows.
Printing 2007-10-31
QTKit Capture Programming Guide (HTML) (PDF)
Describes how to capture media and output it QuickTime movies.
QuickTime 2007-10-31
Quartz Composer Custom Patch Programming Guide (HTML) (PDF)
Describes how to create custom patches for distribution.
Graphics & Imaging 2007-12-11
Quartz Composer Programming Guide (HTML) (PDF)
Describes how to used the framework to load, play, and control compositions.
Graphics & Imaging 2008-10-15
Quartz Composer User Guide (HTML) (PDF)
Explains how to use the Quartz Composer development tool to create motion graphics compositions.
Graphics & Imaging 2007-07-17
Quick Look Programming Guide (HTML) (PDF)
Describes the purporse and architecture of Quick Look generators and explains how to create them.
User Experience 2008-02-08
QuickTime Kit Programming Guide (HTML) (PDF)
Provides a tutorial on how to build and extend a QTKitPlayer application using the QuickTime Kit framework in Cocoa.
QuickTime 2005-11-09
QuickTime Overview (HTML) (PDF)
Introduces the main concepts and services of QuickTime.
QuickTime 2005-08-11
Resolution Independence Guidelines (HTML) (PDF)
Describes resolution independence and how to start updating applications to support high-resolution monitors.
Graphics & Imaging, User Experience 2007-05-04
Resource Programming Guide (HTML) (PDF)
Explains how to work with nib and bundle resources in Mac OS X applications.
Resource Management 2009-01-06
Ruby and Python Programming Topics for Mac OS X (HTML) (PDF)
Describes Ruby and Python on Mac OS X, and especially the bridges between them and Objective-C and OSA (AppleScript).
Design Guidelines, Scripting & Automation, Tools 2007-10-31
Rulers and Paragraph Styles (HTML) (PDF)
Explains paragraph styles and how to work with the rulers that enable users to manipulate them.
Text & Fonts 2007-09-04
Runtime Configuration Guidelines (HTML) (PDF)
Conceptual and reference information for dynamically configuring your software.
Design Guidelines 2008-07-08
Scripting Bridge Programming Guide for Cocoa (HTML) (PDF)
Describes the Scripting Bridge technology, which bridges OSA-compliant applications to Objective-C, and explains how to use it in Cocoa programs.
Scripting & Automation 2008-03-11
Scroll View Programming Guide for Cocoa (HTML) (PDF)
Describes how to use scroll views in Cocoa applications.
Graphics & Imaging, User Experience 2006-06-28
Search Fields (HTML) (PDF)
Explains how to use Cocoa search fields.
User Experience 2008-02-08
Search Kit Programming Guide (HTML) (PDF)
Describes Search Kit architecture and workflow, and how to add search capabilities to Carbon and Cocoa applications.
Data Management, Text & Fonts, User Experience 2005-12-06
Secure Coding Guide (HTML) (PDF)
Describes techniques to use and factors to consider to make your code more secure from attack.
Security 2008-05-23
Security Overview (HTML) (PDF)
An introduction to computer security concepts and the security APIs in Mac OS X and iPhone OS.
Security 2008-10-15
Segmented Controls Programming Guide for Cocoa (HTML) (PDF)
Explains how to use Cocoa segmented controls.
User Experience 2006-02-07
Sheet Programming Topics for Cocoa (HTML) (PDF)
Explains how to use Cocoa sheets.
User Experience 2006-09-05
Slider Programming Topics for Cocoa (HTML) (PDF)
Explains how to use Cocoa sliders.
User Experience 2006-10-03
Software Delivery Guide (HTML) (PDF)
Explains how to distribute and install Mac OS X software using PackageMaker and Installer.
Tools, User Experience 2006-07-24
Sort Descriptor Programming Topics (HTML) (PDF)
Explains how to use sort descriptors to specify the sorting of collections.
Data Management 2007-07-10
Sound Programming Topics for Cocoa (HTML) (PDF)
Explains how to load and play audio data in Cocoa.
Audio 2006-11-07
Speech (HTML) (PDF)
Explains Cocoa's interfaces to the speech synthesis and speech recognition technologies.
Accessibility, User Experience 2003-08-08
Speech Synthesis Programming Guide (HTML) (PDF)
Describes speech synthesis in Mac OS X and explains how your application can produce customized spoken output.
User Experience 2006-09-05
Spell Checking (HTML) (PDF)
Explains how to use the spell-checking facilities in the Cocoa text system.
Text & Fonts, User Experience 2004-02-09
Spotlight Importer Programming Guide (HTML) (PDF)
Describes the role of metadata importers and how to write them.
File Management 2007-05-27
Spotlight Overview (HTML) (PDF)
Introduces the main components and services of Apple's metadata technology.
Design Guidelines 2007-05-27
Spotlight Query Programming Guide (HTML) (PDF)
Describes how to add Spotlight searching to your applications.
File Management 2006-03-08
Status Bars (HTML) (PDF)
Explains how to use Cocoa status bars.
User Experience 2002-11-12
Steppers (HTML) (PDF)
Explains how to use Cocoa steppers.
User Experience 2002-11-12
Stream Programming Guide for Cocoa (HTML) (PDF)
Explains how to use the Cocoa stream classes to read data from and write data to streams.
Data Management, Networking 2009-05-06
String Programming Guide for Cocoa (HTML) (PDF)
Explains how to create, search, concatenate, and draw strings in Cocoa.
Data Management, Text & Fonts 2008-10-15
Sync Services Programming Guide (HTML) (PDF)
Explains how to add syncing to your applications.
Apple Applications, Internet & Web, Syncing 2007-10-31
Sync Services Tutorial (HTML) (PDF)
Explains how to debug multiple syncing applications using the Syncrospector development tool.
Apple Applications, Internet & Web, Syncing, Tools 2007-07-11
System Services (HTML) (PDF)
Explains how Cocoa applications can extend their capabilities seamlessly to other applications.
Interapplication Communication, User Experience 2002-11-12
Tab Views (HTML) (PDF)
Explains how to use Cocoa tab views.
User Experience 2003-11-06
Table View Programming Guide (HTML) (PDF)
Explains how to use Cocoa table views.
User Experience 2006-04-04
Text Attachment Programming Topics for Cocoa (HTML) (PDF)
Expalins how to add graphics and other attachments to text.
Text & Fonts 2006-12-05
Text Attributes (HTML) (PDF)
Explains how to work with attributes, the distinguishing characteristics of rich text.
Text & Fonts 2004-02-16
Text Editing Programming Guide for Cocoa (HTML) (PDF)
Explains how to control the behavior of the Cocoa text system as it performs text editing.
Text & Fonts 2008-02-08
Text Fields (HTML) (PDF)
Explains how to use Cocoa text fields.
Text & Fonts, User Experience 2004-02-09
Text Input and Output (HTML) (PDF)
Explains how to read and write text files in Cocoa.
Text & Fonts 2004-02-10
Text Input Management (HTML) (PDF)
Explains how to use input servers, input managers, and text views in Cocoa.
Events & Other Input, Text & Fonts 2007-02-08
Text Layout Programming Guide for Cocoa (HTML) (PDF)
Explains how the Cocoa text system lays out text on pages.
Text & Fonts 2008-10-15
Text System Overview (HTML) (PDF)
Explains how the Cocoa text system works. Includes a tutorial.
Text & Fonts 2009-04-08
Text System Storage Layer Overview (HTML) (PDF)
Explains how the Cocoa text system stores the information it needs to lay out text.
Text & Fonts 2005-08-11
Text System User Interface Layer Programming Guide for Cocoa (HTML) (PDF)
Explains how to implement the main, high-level interface to the Cocoa text system.
Text & Fonts, User Experience 2006-06-28
Text Views (HTML) (PDF)
Explains how to use Cocoa text views.
Text & Fonts, User Experience 2004-02-09
Threading Programming Guide (HTML) (PDF)
Explains how to use threads in Cocoa applications.
Performance, Process Management 2008-02-08
Timer Programming Topics for Cocoa (HTML) (PDF)
Explains how to use timers for scheduling automatic, repeating message invocations in Cocoa.
Events & Other Input 2008-11-19
Token Field Programming Guide for Cocoa (HTML) (PDF)
Describes how to set up and programatically manage a token field.
User Experience 2007-12-11
Toolbar Programming Topics for Cocoa (HTML) (PDF)
Explains how to use Cocoa toolbars.
User Experience 2009-02-04
Tree-Based XML Programming Guide for Cocoa (HTML) (PDF)
Explains how to use the NSXML classes of Cocoa to process, modify, and query XML data.
Data Management, Internet & Web 2009-02-04
Undo Architecture (HTML) (PDF)
Explains how to record information in Cocoa so a user can reverse an operation's effect.
Data Management, Design Guidelines, User Experience 2002-11-12
Uniform Type Identifiers Overview (HTML) (PDF)
Describes uniform type identifiers and how to use them.
File Management, Interapplication Communication 2008-04-08
Universal Binary Programming Guidelines, Second Edition (HTML) (PDF)
Conceptual information and tips for writing code that runs on PowerPC-based and Intel-based Macintosh computers.
Intel-Based Macs, Porting 2009-02-04
URL Loading System (HTML) (PDF)
Explains how to manipulate URLs and transfer URL contents.
Internet & Web, Networking 2008-05-06
User Defaults Programming Topics for Cocoa (HTML) (PDF)
Explains how to use the Cocoa defaults system to create and save user preferences.
Data Management, User Experience 2007-10-31
User Interface Validation (HTML) (PDF)
Explains how to use the standard mechanism to validate user interface items in Cocoa.
Design Guidelines, User Experience 2007-07-10
Using PostScript Printer Description Files (HTML) (PDF)
Information for printer vendors. Includes installing files, PPD/PDE binding, and grouping features.
Printing 2005-07-07
Value Transformer Programming Guide (HTML) (PDF)
Explains how to create and use value transformers, which are used with the Controller Layer.
Data Management 2007-04-06
Video (HTML) (PDF)
Explains how to use QuickTime movies in Cocoa.
QuickTime 2002-11-12
View Programming Guide for Cocoa (HTML) (PDF)
Explains how to design and implement Cocoa views in applications.
Graphics & Imaging 2008-04-10
Web Services Core Programming Guide (HTML) (PDF)
Explains how to use the new Web Services client-side frameworks available in Mac OS X.
Internet & Web, Networking 2009-01-06
WebKit DOM Programming Topics (HTML) (PDF)
Describes how to use JavaScript in web content and WebKit-based applications.
Internet & Web 2008-10-15
WebKit Objective-C Programming Guide (HTML) (PDF)
Explains how to use the WebKit to embed web content in both Cocoa and Carbon applications.
Graphics & Imaging, Internet & Web, User Experience 2008-10-15
WebKit Plug-In Programming Topics (HTML) (PDF)
Explains how to develop and deploy browser plug-ins based on the WebKit architecture.
Internet & Web 2008-10-15
Window Programming Guide for Cocoa (HTML) (PDF)
Explains how to use Cocoa windows and panels.
User Experience 2009-02-04
Workspace Services Programming Topics (HTML) (PDF)
Explains how to use the services the workspace class provides to Cocoa applications.
Interapplication Communication 2007-03-06
Xcode Design Tools for Class Modeling (HTML) (PDF)
Describes the Xcode Design Tools for Class Modeling.
Design Guidelines, Tools 2009-02-04
Xcode Overview (HTML) (PDF)
Describes the Xcode IDE and its major components, and provides and overview of the development process.
Tools 2009-01-06
Xcode Project Management Guide (HTML) (PDF)
Provides practical descriptions of the major development tasks developers perform with Xcode.
Tools 2009-01-06
Xcode Quick Tour for Mac OS X (HTML) (PDF)
Provides a hands-on introduction to Xcode, Apple's comprehensive suite of software development tools for Mac OS X.
Tools 2008-10-15
Xcode Tools for Core Data (HTML) (PDF)
Describes the Xcode modeling tools for Core Data.
Data Management, Tools 2008-04-15
Xcode Unit Testing Guide (HTML) (PDF)
Explains how to incorporate test cases to validate individual units of source code.
Design Guidelines 2008-05-02
Xcode Workspace Guide (HTML) (PDF)
Provides an overview of the Xcode workspace, and shows how to use its components and features.
Tools 2009-01-06
XML-RPC and SOAP Programming Guide (HTML) (PDF)
Explains how to make remote procedure calls from applications or from AppleScript scripts.
Interapplication Communication, Internet & Web, Scripting & Automation 2005-03-03