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Technical Notes provide late breaking information about new Apple technologies and supplementary documentation discussing some of the more complex issues related to programming for the Mac OS.

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Maximizing Your Media: A Brief Guide To the Latest and Greatest QuickTime Media Types (HTML) (PDF) ()
TN1087: Documents Quicktime methodolgies to ensure applications see any media types available.
QuickTime 1996-12-01
Migrating to FSRefs & long Unicode names from FSSpecs (HTML) ()
TN2078: Answers and coding techniques to commonly asked questions about adopting FSRefs and long file names.
Carbon 2003-05-06
Movie Data Security (HTML) (PDF)
TN2038: Describes techniques you can use to protect data in QuickTime movies.
QuickTime 2001-12-13
Moving Your Code to Mac OS X (HTML) (PDF) ()
TN2003: Talks about considerations for moving older Mac OS 9 applications to Mac OS X.
Carbon 2000-10-05
MP-Safe Routines (HTML) (PDF)
TN2006: Lists all routines callable from MP tasks under Multiprocessing Services 2.0 and higher.
Carbon 2000-12-21
Multilingual Text Engine Frequently Asked Questions (HTML) (PDF) ()
TN2026: A list of frequently asked questions for the Multilingual Text Engine (MLTE).
Internationalization 2001-07-11
Native Scripting Additions (HTML) (PDF) ()
TN1164: Talks about how to create AppleScript scripting additions (OSAX) for Mac OS X.
AppleScript, Carbon 2004-04-26
New ColorSync 3.0 APIs (HTML) (PDF) ()
TN1185: APIs application can use to take advantage of new features available in ColorSync 3.0.
Graphics & Imaging 2000-08-14
New Sound Input Driver Features (HTML) (PDF) ()
Deprecated - TN1124: Describes the visible features and changes, in Mac OS 8.1, for PCI sound input drivers.
Device Drivers 1998-04-01
The Notification Manager: Problems & Fixes (HTML) (PDF)
TN1026: Describes issues with the Notification Manager 'activate' and 'update' events.
Carbon 1996-02-01
Observing Process Lifetimes Without Polling (HTML) (PDF)
TN2050: Shows a variety of methods to determine process lifetimes without polling.
Carbon, Cocoa 2002-07-01
On Drag Manager Additions (Release 1.1) (HTML) (PDF)
TN1043: Explains how to take advantage of the new Drag Manager features, including the translucent dragging.
Carbon 2000-08-14
On Launching an App with a Document (HTML) (PDF) ()
TN1002: Explains how to programatically launch an application and then tell it to open a document.
Carbon 2000-07-01
Open Firmware Ethernet Debugging II: Telnet downloading (HTML) (PDF) ()
TN2023: Describes a method of debugging a device's firmware using Ethernet to connect a host machine and target machine.
Device Drivers, Hardware 2001-10-30
Open Transport STREAMS FAQ (HTML) (PDF)
Deprecated - TN1117: Decribes writing STREAMS modules and drivers for use with Open Transport.
Carbon, Device Drivers, Networking 1997-12-01
OpenGL Performance Optimization : The Basics (HTML)
TN2093: This document describes some of the concepts and techniques for optimizing performance in OpenGL applications;
Graphics & Imaging 2004-12-01
Opening Resource Files Twice Considered Hard? (HTML) (PDF) ()
TN1120: Describes the behavior of FSpOpenResFile when the resource file is already open, and how to avoid problems.
Carbon 1998-01-01
Optimization Strategies for Mac OS (HTML) (PDF)
TN1174: Achieving the best possible performance in your applications.
Hardware, Performance 1999-09-01
Pascal to C: PROCEDURE Parameters (HTML) (PDF)
Deprecated - PT31: Nested procedures and PROCEDURE parameters in Pascal when converting them into C or C++.
Carbon, Darwin 1990-02-01
PCI Expansion ROMs and You (HTML) (PDF)
TN2000: Demonstrates how to read an expansion ROM on a PCI card in Open Firmware.
Hardware 2000-08-01
'pdat' specification (HTML) (PDF) ()
TN2049: Describes 'pdat' resource printer vendors must include in their drivers to support CarbonLib printing.
Carbon 2002-04-22
Pending Update Perils (HTML) (PDF) ()
Deprecated - TN1147: Discusses potential problems when pending update events for windows behind modal dialogs are not serviced.
Carbon 2000-08-14
The 'plst' Resource (HTML) (PDF) ()
TN2013: Describes the 'plst' resource for Carbon-based applications.
Carbon 2002-02-07
Porting Command Line Unix Tools to Mac OS X (HTML) ()
TN2071: A general guide for Unix developers porting software to Mac OS X.
Darwin, Porting 2003-09-03
Power Management for Macintosh; getting started (HTML) ()
TN2075: Outlines available documentation and its location for power management on Mac OS X and OS 9.
Device Drivers, Hardware 2003-05-30
Power Manager 2.0 (HTML) (PDF) ()
TN1190: Describes the Macintosh Power Manager 2.0.
Carbon, Hardware 2000-08-14
PowerBook HD Upgrades and SCSI disk mode Compatibility (HTML) (PDF) ()
TN1116: Describes potential drive upgrades and SCSI disk mode issues in PowerBook pre-G3 and pre-3400 models.
Hardware 1998-02-01
PowerPC G5 Performance Primer (HTML) ()
TN2087: Offers a high-level overview of how to maximize performance on G5 Macs.
Carbon, Hardware 2003-09-03
The Preferences Problem (HTML) (PDF) ()
Deprecated - TN1134: Outlines typical problems with preferences files and some of their solutions.
Carbon, Core Foundation 1998-10-01
Programmatic Mounting of AppleShare Volumes (HTML) (PDF) ()
TN1111: Mount an AppleShare volume using PBVolumeMount. AFPVolMountInfo structure is defined along with the AFPXVolMountInfo structure.
Carbon 1997-10-01
QuickTime 3.0.2 (HTML) (PDF) ()
Deprecated - TN1139: Describes changes between the final release of QuickTime 3.0 and update 3.0.2.
QuickTime 1998-09-01
QuickTime 4.0.3 (HTML) (PDF) ()
TN1183: Changes between the final release of QuickTime 4 and the update release of QuickTime 4.0.3.
QuickTime 1999-10-01
QuickTime 4.1.1/4.1.2 (HTML) (PDF)
Deprecated - TN1197: Changes between QuickTime 4.1 and the update QuickTime 4.1.1 and 4.1.2.
QuickTime 2000-04-01
QuickTime For Windows: Resolving Common Installation Issues (HTML) (PDF) ()
TN1074: Details install dialog, customizing installation, and uninstalling QuickTime for Windows v 2.1.2.
QuickTime 1996-10-01
Resolving Alias Files Quietly (HTML) (PDF)
FL30: Describes how to resolve alias files on remote volumes without user interaction.
Carbon, Cocoa 1999-11-01
Running files from a hard drive in Open Firmware (HTML) (PDF)
TN2001: Demonstrates editing, saving, and retrieving Open Firmware commands to a file on a Macintosh hard drive.
Device Drivers, Hardware 2000-09-22
Scribbling Into AWT Components (HTML) (PDF) ()
Deprecated - TN1156: Describes how to draw into an AWT Component by means other than the Java AWT Graphics API.
Java 2000-08-14
Scripting Interface Guidelines (HTML)
TN2106: Directions for providing a clean and consistent scripting interface for your application.
AppleScript, Carbon, Cocoa, User Experience 2004-03-01
Searching Volumes - Solutions and Problems (HTML) (PDF)
Deprecated - FL31: Discusses searching volumes using PBCatSearch.
Carbon 1988-10-01
Sherlock's Find By Content Library (HTML) (PDF) ()
TN1180: A description of routines provided by Sherlock's Find by Content library.
Apple Applications 1999-10-01
SimpleCocoaApp: An Overview (HTML) (PDF) ()
TN2005: A high level overview of the steps required to build a simple Cocoa application.
Cocoa 2000-10-25
SndPlayDoubleBuffer and Carbon (HTML) (PDF) ()
TN1198: Removal of the SndPlayDoubleBuffer and other APIs from the Carbon API set and Carbon solutions.
Carbon, Games, Music & Audio, Porting, QuickTime 2002-06-12
Supplying codec-specific options within the Standard Compression Dialog (HTML) ()
TN2081: Discusses the ImageCodec 'DITL' APIs introduced with QuickTime 6.
QuickTime 2003-05-20
The System Sound APIs for Mac OS X 10.2, 10.3 and later (HTML)
TN2102: Discusses the System Sound APIs for correctly playing Alerts and User Interface Sound Effects
Music & Audio 2004-07-13
Tagging Handle and Pointer Data References in QuickTime (HTML) (PDF)
TN1195: The use of data reference extensions used by QuickTime to tag handle and pointer data references.
Cocoa, QuickTime 2004-05-26
Tailoring Java Applications for Mac OS X (HTML) (PDF) ()
Deprecated - TN2042: Tips and tricks for an optimal Macintosh experience in a Java application.
Java 2002-05-23
Thread-safe programming in QuickTime (HTML)
TN2125: Discusses how to use QuickTime from background threads for applications and component developers.
Carbon, Cocoa, QuickTime 2004-10-08
Thread-Safe Toolbox Access From MRJ (HTML) (PDF) ()
Deprecated - TN1153: Thread-Safe Toolbox access from MRJ on Mac OS Classic.
Java 2000-08-14
Threading Architectures (HTML) (PDF) ()
TN2028: Describes the various threading APIs on Mac OS 9 and Mac OS X.
Carbon 2001-08-08
Tuning for G5: A Practical Guide (HTML) ()
TN2086: Explains how to get started tuning your application for the new Macintosh G5 architecture.
Carbon 2003-10-01
TWAIN Data Sources for Mac OS X (HTML) ()
TN2088: Describes how to implement a TWAIN Data Source (DS) for Mac OS X
QuickTime 2003-06-19
Understanding and Debugging Kernel Panics (HTML) (PDF) ()
TN2063: Addresses kernel panics: what they are and how to debug the code that caused the panic.
Darwin 2002-11-11
Understanding and Detecting OpenGL Functionality (HTML)
TN2080: Discusses OpenGL API design, and how to access the full power of hardware and software renderers.
Carbon, Cocoa, Graphics & Imaging 2003-12-29
Understanding Open Transport Asset Tracking (HTML) (PDF)
TN1173: Open Transport tracks assets, like memory and providers, which it allocates on your behalf.
Networking 2000-11-03
Understanding the Differences Between Apple and Windows IMA-ADPCM Compressed Sound Files (HTML) (PDF)
TN1081: Details the differences between Apple IMA and Windows IMA (ADPCM) compressed sound files.
QuickTime 1996-11-01
Uniquely Identifying a Mac OS Computer (HTML) (PDF) ()
TN1103: Describes techniques to distinguish between models of Mac OS computers.
Networking, Security 1997-12-01
Unknown Sound Features (HTML) (PDF) ()
TN1108: Documents some obscure, but useful, features of the Sound Manager.
Hardware, Mac OS 9 & Earlier 1997-10-01
Update: Borrowed AFP Sessions (HTML) (PDF) ()
TN1106: Shows how to borrow the session reference number of an AFP volume mounted by the Macintosh File System.
Carbon, Networking 2000-08-14
USB Printer Sharing Compatibility (HTML) (PDF)
TN1199: Describes how to make drivers compatible with USB Printer Sharing.
Hardware, Printing 2000-06-01
Using collection classes safely with multithreaded applications (HTML) (PDF) ()
TN2059: Describes some problems with and workarounds for using mutable collection classes in multithreaded applications.
Carbon, Cocoa 2002-09-10
Using Launch Services for discovering document binding and launching applications (HTML) (PDF) ()
TN2017: Interface to starting applications, opening documents either with a specific application, or using the default application.
Carbon 2001-04-17
Using the 3DMixer Audio Unit (HTML)
TN2112: Discusses how to use Core Audio's 3DMixer version 2.0
Carbon, Games, Music & Audio, Performance 2004-06-14
Using the Drag Manager to Interact with and Manipulate File System Entities (HTML) (PDF) ()
TN1085: Details the data flavors provided by the Drag Manager for interacting with and manipulating file system entities.
Carbon 1996-12-01
Version Territory (HTML) (PDF) ()
TN1132: Clarifies the format of data in the NumVersion structure used in a version ( 'vers') resource.
Carbon 2003-08-25
Version Territory (HTML)
Deprecated - OV12: Please see Technical Note 1132 - Version Territory.
Carbon 1988-04-01
Virtual Memory Application Compatibility (HTML) (PDF)
Deprecated - TN1094: Provides an introduction to how virtual memory works under Traditional Mac OS.
Carbon 1998-04-01
Weak-Linking to a Code Fragment Manager-based Shared Library (HTML) (PDF) ()
TN1083: Describes weak-linking to CFM shared libraries.
Carbon 1996-11-01
What's New With ColorSync 2.6 (HTML) (PDF) ()
TN1160: Details the changes in ColorSync 2.6.
Graphics & Imaging 1999-04-01
Working Around Incorrect -needsToDrawRect: Behavior in Custom View Classes (HTML)
TN2107: Describes how to work around a bug in NSView's -needsToDrawRect: method.
Cocoa 2004-02-06
Working with Multiprocessing Services (HTML) (PDF) ()
TN1071: Discusses some techniques for use with Apple's Multiprocessing Services APIs.
Carbon 2000-08-14
Writing Plug-ins for Desktop Printer Utility (HTML) (PDF)
TN1172: Plug-ins for DTPU version 1.2 and later to configure different types of desktop printers.
Printing 2000-08-14
You Want Permission to do What?!! (HTML) (PDF)
FL37: Provides an-depth discussion of the File Manager and AFP permission models.
Carbon 1999-04-01