---
title: Introduction to 64-Bit Guide for Carbon Developers
framework: carbon
role: article
path: apple-archive/documentation/Carbon/Conceptual/Carbon64BitGuide/Introduction
---

# Introduction to 64-Bit Guide for Carbon Developers

Explains the changes necessary to create a 64-bit executable version of a Carbon application.

## Who Should Read This Document?

This document is recommended reading for Carbon developers who want to learn what changes are necessary to create 64-bit executable versions of their applications.

## Organization of This Document

This document contains the following chapters:

- [The Transition to 64-Bit Addressing](../TransitionTo64Bit/TransitionTo64Bit.html#//apple_ref/doc/uid/TP40004381-CH2-SW1) describes the 64-bit initiative for OS X and offers general advice and guidelines for moving your projects to 64-bit addressing. - [Modifying Your Application to Use 64-Bit Addressing](../PortingTo64Bit/PortingTo64Bit.html#//apple_ref/doc/uid/TP40004381-CH3-SW1) describes what kinds of modifications are necessary in Carbon applications to make them compile and run as 64-bit executables. - [Changes in the Human Interface Toolbox](../HIToolboxChanges/HIToolboxChanges.html#//apple_ref/doc/uid/TP40004381-CH4-SW1) describes what’s changed in Carbon user interface APIs. - [Changes in Other C APIs](../OtherAPIChanges/OtherAPIChanges.html#//apple_ref/doc/uid/TP40004381-CH5-SW4) describes what’s changed in other managers and system services commonly used by Carbon applications, including printing and QuickTime.

## See Also

This document is a supplement to *[64-Bit Transition Guide](../../../../Darwin/Conceptual/64bitPorting/intro/intro.html#//apple_ref/doc/uid/TP40001064)*, the definitive guide to 64-bit computing in OS X. If you haven’t already done so, you should read *[64-Bit Transition Guide](../../../../Darwin/Conceptual/64bitPorting/intro/intro.html#//apple_ref/doc/uid/TP40001064)* before reading this document.

For Cocoa-specific information, you should read *[64-Bit Transition Guide for Cocoa](../../../../Cocoa/Conceptual/Cocoa64BitGuide/Introduction/Introduction.html#//apple_ref/doc/uid/TP40004247)*.

You may also want to read *Tiger Developer Overview Series: Developing 64-bit Applications*, an ADC featured article that discusses 64-bit computing in OS X v10.4.

[Next](../TransitionTo64Bit/TransitionTo64Bit.html)

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