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Technical Q&As are short question and answer formatted pages that provide answers to questions frequently received at Apple Developer Technical Support.

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TCP/IP Option Sizes (HTML) (日本語 HTML)
NW62: Enumerates the TCP/IP options and their sizes for Open Transport.
Hardware & Drivers 1999-04-26
Tips on USB driver matching for Mac OS X (HTML)
QA1076: Gives some tips on getting USB driver matching to work.
Hardware & Drivers 2001-10-02
Use the Doorbell (HTML) (日本語 HTML)
Deprecated - FW01: Explains the function of the FireWire Serial Bus Protocol 2 (SBP2) doorbell.
Hardware & Drivers 1999-05-17
Using "words" in Open Firmware (HTML)
HW73: Explains how to search for specific entries within all the global and local Open Firmware words.
Hardware & Drivers 1999-10-11
Was that a path I just saw? (HTML)
HW101: Describes the Open Firmware path that is occasionally shown at boot time.
Hardware & Drivers 2000-10-06
What are configuration variables in Open Firmware? (HTML) (日本語 HTML)
HW38: Defines the configuration variables in Open Firmware.
Hardware & Drivers 1999-02-15
What are generic names in Open Firmware? (HTML) (日本語 HTML)
HW34: Documents the generic names in Open Firmware.
Hardware & Drivers 1999-02-15
What are snag keys in Open Firmware? (HTML) (日本語 HTML)
HW35: Explains Open Firmware snag keys, including examples of their function.
Hardware & Drivers 1999-02-15
What is a CardBus host bus adapter HBA? (HTML)
HW79: Explains what a CardBus host bus adapter (HBA) is and discusses its implementation on the Macintosh.
Hardware & Drivers 1999-11-15
What is a tokenizer? (HTML) (日本語 HTML)
HW58: Defines a tokenizer.
Hardware & Drivers 1999-03-29
What is an Open Firmware devalias? (HTML)
HW99: Describes devaliases in Open Firmware.
Hardware & Drivers 2000-10-06
What is an Open Firmware phandle, and why can't I access it from the Mac OS? (HTML)
HW76: Explains an "Open Firmware phandle" and why it is inaccessible from the Mac OS.
Hardware & Drivers 1999-11-15
What is meant by 1 machine mode vs. 2 machine mode with respect to Open Firmware? (HTML) (日本語 HTML)
HW36: Documents 1 machine mode vs. 2 machine mode in Open Firmware.
Hardware & Drivers 1999-02-15
What is the "dump" word and how do I use it? (HTML)
HW68: Describes the function of the Open Firmware word "dump" and how it can be used.
Hardware & Drivers 1999-10-11
What is the return stack in Open Firmware and can I use it? (HTML)
HW67: Describes the purpose of the Open Firmware return stack and how developers can use it.
Hardware & Drivers 1999-10-11
What is the word "see" and how do I use it to help me find what a word does? (HTML)
HW72: Explains the function and use of the Open Firmware word "see".
Hardware & Drivers 1999-10-11
What is unsolicited status? (HTML) (日本語 HTML)
FW03: Explains the meaning and usage of the SBP-2 unsolicited status message.
Hardware & Drivers 1999-05-17
What numeric base is the default for the Open Firmware user interface? (HTML)
HW65: Describes how the default numeric base used by the Open Firmware user interface is hexadecimal.
Hardware & Drivers 1999-10-11
When to use PCMCIA, PC Card, and CardBus (HTML)
HW77: Explains the differences between PCMCIA, PC Card, and CardBus.
Hardware & Drivers 1999-11-15
Which Machines Support Driver Services Library and the MP Nanokernel? (HTML) (日本語 HTML)
HW63: Lists the systems that do and don't support the Driver Services Library and the MP Nanokernel.
Hardware & Drivers 1999-07-12
Why did the name of the PCI bridge change? (HTML) (日本語 HTML)
HW59: Explains the name change of the PCI bridge to the generic name "pci" in Open Firmware.
Hardware & Drivers 1999-03-29
Why does logging keep my Printer Module from working? (HTML) (日本語 HTML)
Deprecated - QA1182: Describes some problems with standard printf logging in a Printer Module on Jaguar.
Hardware & Drivers 2002-11-06
Why don't all of my PDE localizations show up in all applications? (HTML) (日本語 HTML)
QA1185: Explains why some PDE localizations might not appear in all applications.
Hardware & Drivers 2002-10-16
Workaround for Asynchronous SCSIAction Crashes (HTML) (日本語 HTML)
Deprecated - QA1129: Explains how to workaround asynchronous SCSIAction crashes on Mac OS X.
Hardware & Drivers 2002-03-21
Working with Configuration Variables (HTML) (日本語 HTML)
QA1119: Explains how to delete a specific Open Firmware configuration variable without using Command-Option-P-R.
Hardware & Drivers 2002-02-13
BOM characters in 'utxt' clipboard flavor (HTML) (日本語 HTML)
QA1221: Explains the use of the BOM character in 'utxt' scrap data
Internationalization 2003-01-20
Converting to Precomposed Unicode (HTML) (日本語 HTML)
QA1235: Describes how to convert a string to precomposed Unicode.
Internationalization 2003-02-07
How can I determine the order of the languages set by the user in the Language tab of the International preference pane? (HTML)
QA1391: Retrieving the order of the languages set by the International preference pane in Cocoa, Carbon, and Terminal.
Internationalization 2006-12-19
Improving ATSUI Text Drawing Performance (HTML)
QA1027: Talks about one way of improving ATSUI text drawing performance.
Internationalization 2001-04-17
Installing input methods on Mac OS X (HTML)
QA1054: Describes how to install and use input methods on Mac OS X.
Internationalization 2001-09-14
Obtaining the localized application name in Cocoa (HTML)
QA1544: Describes how to obtain several versions of the application name in Cocoa.
Internationalization 2007-09-21
Accessing HTTPS Proxy Settings (HTML) (日本語 HTML)
QA1234: Describes how to programatically access Secure Web Proxy information.
Internet & Web 2003-02-19
Availability of Quartz Composer Patches in Web Kit (HTML)
QA1505: Details which Quartz Composer patches are available in Web Kit
Internet & Web 2007-03-05
Changing the TCP Window Size (HTML)
NW47: Describes how to change the TCP window size in Open Transport.
Internet & Web 1997-03-14
The "chosen" node in the device tree (HTML)
HW88: Describes how to find the "chosen" node in the Open firmware device tree.
Internet & Web 2000-09-05
Debugging a WebKit Plug-in in Xcode (HTML)
QA1500: Directions for debugging a WebKit plug-in in Xcode.
Internet & Web 2007-06-05
Developer Tools JBoss and Tomcat Do Not Start After Installing Java 1.4.2 Update (HTML)
QA1025: Describes how to re-enable JBoss and Tomcat after installing the Java 1.4.2 update.
Internet & Web 2004-03-04
Does Safari support 128-bit encryption? (HTML)
QA1320: Discusses support for 128-bit encryption in Apple's Safari web browser.
Internet & Web 2004-09-10
Enabling X11 Forwarding (HTML)
QA1383: Describes how to enable ssh clients to receive X11 communication from a Mac OS X system.
Internet & Web 2004-10-25
Getting a Packet Trace (HTML) (日本語 HTML)
QA1176: Lists tools available for looking at the network packets on the wire.
Internet & Web 2008-06-03
Hang launching signed Applets from JavaScript (HTML)
QA1395: Making a LiveConnect call to a signed Applet before that Applet has finished loading can cause a hang.
Internet & Web 2004-12-02
How do I get the hexadecimal value of an NSColor object? (HTML)
QA1576: Describes how to convert an NSColor object to its Hexadecimal value.
Internet & Web 2007-12-19
Intel-Based Macs, Dashboard, Safari, and You (HTML)
QA1451: Concerns and details regarding widget and web development for Intel-based Macintosh computers
Internet & Web 2006-12-13
Internet Connect Speed (HTML) (日本語 HTML)
QA1165: Describes how to get the modem connection speed from the System Configuration framework dynamic store.
Internet & Web 2003-03-26
Launching the Default Internet Browser (HTML) (日本語 HTML)
NW60: Shows with sample code how to invoke a user's default browser to open a specific URL.
Internet & Web 1999-10-11
OTScheduleDeferredTask When Task Running (HTML) (日本語 HTML)
NW52: Describes what happens when you use OTScheduleDefferedTask to schedule a task that is running.
Internet & Web 1997-10-13
Programmatically Performing an Open Directory Search (HTML)
QA1462: A short guide on how to programmatically search Open Directory for matching attribute values within records.
Internet & Web 2006-09-11
Sharing Browser Cookies With Java Applets (HTML) (日本語 HTML)
QA1265: Creating a persistent browser session (cookie) inside Java 1.3 Applets
Internet & Web 2004-10-13
T_DATA_REQ vs M_DATA TPI Message Blocks (HTML) (日本語 HTML)
NW42: Explains why OT passes data to a TPI module using M_DATA message blocks instead of M_PROTO+T_DATA_REQ.
Internet & Web 1996-10-25
TCP/IP Option Sizes (HTML) (日本語 HTML)
NW62: Enumerates the TCP/IP options and their sizes for Open Transport.
Internet & Web 1999-04-26
Where are the LiveConnect classes on Mac OS X? (HTML)
QA1364: Locating classes necessary to build Java-Javascript communication into Java Applets on Mac OS X.
Internet & Web 2006-10-02
Why is my Ruby on Rails application with FastCGI generating "'load error /etc/irbrc" errors? (HTML)
QA1494: Describes how to resolve an error encountered hosting Ruby on Rails applications on Mac OS X 10.5.
Internet & Web 2007-11-28
CFBundleIdentifier and user application access (HTML)
QA1373: Describes the role of CFBundleIdentifier in limiting a user's application access.
Java 2005-02-08
Customizing Component Border Colors (HTML) (日本語 HTML)
QA1272: Retaining Aqua background for JComboBox menus with custom control borders.
Java 2003-07-31
Debugging Graphics with QuartzDebug (HTML) (日本語 HTML)
QA1236: Explains how to use QuartzDebug to debug graphics issues.
Java 2006-01-12
Developer Tools JBoss and Tomcat Do Not Start After Installing Java 1.4.2 Update (HTML)
QA1025: Describes how to re-enable JBoss and Tomcat after installing the Java 1.4.2 update.
Java 2004-03-04
Exception in JFileChooser.setAcceptAllFileFilterUsed (HTML)
Deprecated - QA1280: Workaround for a known issue in Java 1.4.1 Update 1 on Jaguar.
Java 2003-10-07
Getting a Packet Trace (HTML) (日本語 HTML)
QA1176: Lists tools available for looking at the network packets on the wire.
Java 2008-06-03
Hang launching signed Applets from JavaScript (HTML)
QA1395: Making a LiveConnect call to a signed Applet before that Applet has finished loading can cause a hang.
Java 2004-12-02
Illustrating document window changes in Swing (HTML) (日本語 HTML)
QA1146: Using the Aqua close button dot in Swing applications to indicate document changes.
Java 2002-06-18
Important Java Directories on Mac OS X (HTML) (日本語 HTML)
QA1170: Mac OS X equivalents of common Java runtime and development directories.
Java 2003-10-21
Java on Intel-based Macs (HTML)
QA1295: Required changes (if any) for Java applications to run on Intel-based Macs.
Java 2006-10-17
Mixing AWT/Swing and Cocoa-Java (HTML)
QA1342: Recommended alternatives to mixing Cocoa-Java and AWT/Swing.
Java 2006-10-12
Rendering Multi-line text in JTree nodes (HTML)
QA1091: Correcting render problems with multi-line JTree node labels in the Aqua look and feel.
Java 2001-11-02
Right- and Control-Drags on Mac OS X (HTML)
QA1362: Describes a difference in Drag and Drop on Mac OS X that affects all cross-platform Java applications
Java 2005-06-29
Server Processes and the Dock (HTML) (日本語 HTML)
QA1328: Discusses using headless AWT from Java server applications that need to be hidden.
Java 2004-01-19
Sharing Browser Cookies With Java Applets (HTML) (日本語 HTML)
QA1265: Creating a persistent browser session (cookie) inside Java 1.3 Applets
Java 2004-10-13
Unsolicited About Boxes (HTML)
QA1363: How to properly override the default about and quit behaviors in Java 1.4 and later
Java 2004-08-31
UnsupportedClassVersionError With J2SE 5.0 Release 4 (HTML)
QA1474: Explains problems running existing Xcode projects after upgrading to J2SE 5.0 Release 4
Java 2006-04-14
Using the QuickTime for Java libraries on OS X (HTML) (日本語 HTML)
QA1058: Where to locate the QTJava.zip file for inclusion in your java/javac classpath.
Java 2002-04-08
Where are the LiveConnect classes on Mac OS X? (HTML)
QA1364: Locating classes necessary to build Java-Javascript communication into Java Applets on Mac OS X.
Java 2006-10-02
Accessing HTTPS Proxy Settings (HTML) (日本語 HTML)
QA1234: Describes how to programatically access Secure Web Proxy information.
Mac OS X Server 2003-02-19
ANSI SCSI Standards (HTML)
Deprecated - DV03: Describes past Macintosh systems that did not fully support the ANSI SCSI-1 standard.
Mac OS X Server 1995-07-01
The "chosen" node in the device tree (HTML)
HW88: Describes how to find the "chosen" node in the Open firmware device tree.
Mac OS X Server 2000-09-05
Difference between using Restart or Shut Down in the Finder's Special menu in Open Firmware (HTML) (日本語 HTML)
HW47: Explains the differences between using Restart or Shut Down on Open Firmware
Mac OS X Server 1999-02-15
Enabling X11 Forwarding (HTML)
QA1383: Describes how to enable ssh clients to receive X11 communication from a Mac OS X system.
Mac OS X Server 2004-10-25
Expansion ROM device properties (HTML) (日本語 HTML)
HW50: Describes the Open Firmware properties that should be included in a boot device's expansion ROM.
Mac OS X Server 1999-03-29
Generating an NMI Without a Programmer's Switch (HTML) (日本語 HTML)
QA1264: Explains how to generate a non-maskable interrupt (NMI) on CPUs without programmer's switches.
Mac OS X Server 2004-04-26
Getting a Packet Trace (HTML) (日本語 HTML)
QA1176: Lists tools available for looking at the network packets on the wire.
Mac OS X Server 2008-06-03
Importing Projects from WO 4.5.x into WO 5.0 (HTML)
QA1035: Describes how to import WebObjects 4.5.x projects into WebObjects 5.0.
Mac OS X Server 2001-07-09
Installing an I/O Kit KEXT Without Rebooting (HTML)
QA1319: Describes the state of the art of installing I/O Kit kernel extensions (KEXTs) without requiring a restart.
Mac OS X Server 2003-10-28
Internet Connect Speed (HTML) (日本語 HTML)
QA1165: Describes how to get the modem connection speed from the System Configuration framework dynamic store.
Mac OS X Server 2003-03-26
IOKit Framework Headers (HTML) (日本語 HTML)
QA1107: Describes the differences between the headers in IOKit.framework and the I/O Kit headers in Kernel.framework.
Mac OS X Server 2002-01-15
Is ColorSync thread safe? (HTML) (日本語 HTML)
QA1261: Discusses ColorSync thread-safety issues.
Mac OS X Server 2003-04-17
Is the Open Firmware device tree object oriented? (HTML)
HW80: Discusses the object-oriented attributes of the Open Firmware device tree.
Mac OS X Server 1999-11-15
Non Mac OS X Bundled data-fork based Resources (HTML) (日本語 HTML)
QA1098: Mac OS X Bundled data-fork based Resources
Mac OS X Server 2003-08-20
The "packages" node in the device tree (HTML)
HW90: Describes the "packages" node in the Open Firmware device tree.
Mac OS X Server 2006-02-22
PCI Type 1 Cycles (HTML)
HW26: Describes the circumstances when the PowerMac generates a Configuration Type 1 command.
Mac OS X Server 1995-07-15
Programmatically Accessing and Manipulating Multiple Keychain Items (HTML)
QA1486: An explanation on what is and is not possible using the SecKeychain API to manipulate Keychain Items.
Mac OS X Server 2006-10-03
Programmatically causing restart, shutdown and/or logout (HTML) (日本語 HTML)
QA1134: Describes how to programmatically cause restart, shutdown, sleep or logout.
Mac OS X Server 2008-01-23
Programmatically Performing an Open Directory Search (HTML)
QA1462: A short guide on how to programmatically search Open Directory for matching attribute values within records.
Mac OS X Server 2006-09-11
QDFlushPortBuffer (HTML) (日本語 HTML)
QD65: Describes a possible solution for window update problems under Carbon.
Mac OS X Server 2000-11-08
Sample code for allocating an amount of dictionary space (HTML)
HW71: Discusses the allocation and the setting of memory for Dictionary space in Open Firmware.
Mac OS X Server 1999-10-11
Security Framework Error Codes (HTML)
QA1499: Explains how to interpret errors returned by the Security Framework with an overview of Security error handling.
Mac OS X Server 2006-11-16
Sending SCSI or ATA commands to storage devices (HTML) (日本語 HTML)
QA1179: Explains that Mac OS X does not implement SCSI or ATA pass-through for many mass storage devices.
Mac OS X Server 2005-05-10
Server Processes and the Dock (HTML) (日本語 HTML)
QA1328: Discusses using headless AWT from Java server applications that need to be hidden.
Mac OS X Server 2004-01-19
What are snag keys in Open Firmware? (HTML) (日本語 HTML)
HW35: Explains Open Firmware snag keys, including examples of their function.
Mac OS X Server 1999-02-15
What is the "dump" word and how do I use it? (HTML)
HW68: Describes the function of the Open Firmware word "dump" and how it can be used.
Mac OS X Server 1999-10-11
What numeric base is the default for the Open Firmware user interface? (HTML)
HW65: Describes how the default numeric base used by the Open Firmware user interface is hexadecimal.
Mac OS X Server 1999-10-11
Why did the name of the PCI bridge change? (HTML) (日本語 HTML)
HW59: Explains the name change of the PCI bridge to the generic name "pci" in Open Firmware.
Mac OS X Server 1999-03-29