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The Reference Library is a comprehensive collection of Apple technical resources, including Articles, Guides, Reference, Release Notes, Sample Code, Technical Notes, and Technical Q&As. Each of the links below leads to the resources for a specific topic.

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Collaboration Framework Reference (HTML) (PDF)
Describes the Objective-C API for monitoring and editing identities.
Networking Reference 2007-05-14
Collaboration Reference Update (HTML) (PDF)
Summarizes the symbols added to the Collaboration framework.
Networking Release Notes 2007-07-18
Configuring and Running X11 Applications on Mac OS X (HTML)
Learn to set up and use X11 applications on your Mac OS X system.
Networking Articles 2005-01-17
Core Services Framework Reference (HTML) (PDF)
Describes the API for many fundamental operating system services.
Networking Reference 2007-10-31
Core Services Identity Reference (HTML)
Describes the C API for creating, maintaining and finding users and groups.
Networking Reference 2008-04-08
Creating Secure Transactions on Mac OS X Server with SSL (HTML)
Learn how to provide a layer of public-key encryption over any TCP connection.
Networking Articles 2004-01-12
CryptNoMore (HTML) (DMG) (ZIP)
Shows how to authenticate a user using Open Directory (Directory Services).
Networking Sample Code 2008-03-17
Darwin Notification API Reference (HTML)
Describes the Darwin API for interprocess notification.
Networking Reference 2008-04-08
Deploying Mac OS X Computers for K-12 Education (PDF)
Explains how to configure and deploy Mac OS X Server and Mac OS X computers for K-12 education.
Networking Guides 2006-07-24
Descriptor Passing Problems (HTML)
QA1541: Describes how to work around common problems with descriptor passing.
Networking Technical Q&As 2007-10-29
Determining if a Drive is a Network Volume (HTML) (日本語 HTML)
NW09: Shows how to determine if a volume is mounted over the network.
Networking Technical Q&As 1998-06-01
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
Networking Technical Q&As 1999-02-15
Directory Service Framework Reference (HTML)
Describes the Directory Service Framework.
Networking Reference 2008-04-08
Directory Service Reference Update (HTML) (PDF)
Summarizes the symbols added to the Directory Service framework.
Networking Release Notes 2007-05-02
Directory Services for Mac OS X Server v10.5 Release Notes (HTML)
Describes updates, changes, and workarounds for Directory Services for Mac OS X Server v10.5
Networking Release Notes 2007-06-08
Discovering all advertised Bonjour service types (HTML)
QA1337: Explains how to discover all Bonjour service types being advertised on the local network.
Networking Technical Q&As 2004-06-01
Distributed Objects Programming Topics (HTML) (PDF)
Explains how Objective-C objects in different threads or different processes communicate.
Networking Guides 2007-06-06
DNS Service Discovery C Reference (HTML)
Describes the DNS Service Discovery API for implementing Bonjour in an application.
Networking Reference 2008-04-23
DNS Service Discovery Java Reference (HTML)
Describes DNS Service Discovery API features of ZeroConf networking for Java on Mac OS X in Javadoc format.
Networking Reference 2008-10-15
DNS Service Discovery Programming Guide (HTML) (PDF)
Explains how to use DNS Service Discovery in your application.
Networking Guides 2005-11-09
DNSServiceDiscovery Mach-Based API (HTML) (PDF)
Deprecated.
Networking Guides 2005-04-29
DNSServiceMetaQuery (HTML) (DMG) (ZIP)
Shows how to discover Bonjour service types being advertised on the local network.
Networking Sample Code 2005-06-01
DockBrowser (HTML) (DMG) (ZIP)
Demonstrates how to use CFNetServices to take advantage of Bonjour service discovery and name resolution.
Networking Sample Code 2005-02-08
Don't forget to cancel your Bonjour resolve (HTML)
QA1297: Explains why it's important to cancel a Bonjour resolve operation.
Networking Technical Q&As 2007-08-30
Downloading through a proxy server in Mac OS X (HTML)
QA1296: Explains when downloading through a proxy server will work, and when it will fail.
Networking Technical Q&As 2003-10-29
Duplicate Bonjour services while browsing (HTML)
QA1333: Explains how to work with multiple network interfaces when browsing for Bonjour services.
Networking Technical Q&As 2004-02-06
Embedding Bonjour in Windows Applications (HTML)
TN2210: Details the proper steps necessary for a Windows Developer to include Bonjour for Windows in their application.
Networking Technical Notes 2008-01-17
enetlognke (HTML) (DMG) (ZIP)
Interface filter based on supported Kernel Programming Interfaces for Tiger.
Networking Sample Code 2005-08-10
Error -3168 (kOTStateChangeErr) and Handoff Endpoints (HTML) (日本語 HTML)
Deprecated - NW22: Explains why a kOTStateChangeErr -3168 occurs when there is a handoff endpoint involved.
Networking Technical Q&As 1996-04-08
Extending and Troubleshooting Directory Services (HTML)
Explains how to extend Directory Services for Mac OS X Server v10.5 and how to troubleshoot problems.
Networking Release Notes 2009-02-04
fBroadCastAddr Always Zero (HTML) (日本語 HTML)
Deprecated - NW58: Explains why the fBroadcastAddr field may be zero after a call to OTInetGetInterfaceInfo and includes the workaround.
Networking Technical Q&As 1999-03-08
Generating a Non-Maskable Interrupt (NMI) (HTML) (日本語 HTML)
QA1264: Explains how to generate a non-maskable interrupt (NMI) on modern Macintosh systems.
Networking Technical Q&As 2008-10-13
GetHWEthernetAddr (HTML) (DMG) (ZIP)
Deprecated - Shows how to obtain the hardware Ethernet address of a machine.
Networking Sample Code 2003-01-14
GetMACAddressSample (HTML) (DMG) (ZIP)
Demonstrates how to retrieve the MAC address for each Ethernet interface from the Mac OS X I/O Registry.
Networking Sample Code 2003-01-14
GetPrimaryMACAddress (HTML) (DMG) (ZIP)
Demonstrates retrieving the MAC address of the built-in Ethernet controller. Useful for uniquely identifying a Macintosh system.
Networking Sample Code 2005-10-27
GetSetOptions (HTML) (DMG) (ZIP)
Demonstrates a variety of uses of Open Transport's option management routines.
Networking Sample Code 2003-01-14
Getting a Packet Trace (HTML) (日本語 HTML)
QA1176: Lists tools available for looking at the network packets on the wire.
Networking Technical Q&As 2008-06-03
Getting the User and Computer Name (HTML)
QA1078: Describes how to get the user and computer name on Mac OS X.
Networking Technical Q&As 2001-10-30
GridCalendar (HTML) (DMG) (ZIP)
Demonstrates how to add a custom job submission UI to the GridSample project.
Networking Sample Code 2005-06-01
Handing Off TCP Connections to a Different Port (HTML) (日本語 HTML)
NW25: Explains that a passive TCP connection cannot hand off the connection to a different port address.
Networking Technical Q&As 1996-05-14
How to use URL Access with proxy servers (HTML)
Deprecated - QA1074: Explains how to use URL Access with proxy servers.
Networking Technical Q&As 2001-10-02
Identity Services Programming Guide (HTML) (PDF)
Explains how identities work and how to use them in applications.
Networking Guides 2008-10-15
Identity Services Reference Collection (HTML) (PDF)
Describes the APIs for using identities and the Identity Picker.
Networking Reference 2007-05-14
IdentitySample (HTML) (DMG) (ZIP)
IdentitySample builds a utility which demonstrates how to use the CoreServices Identity API to manage system-wide identities
Networking Sample Code 2006-07-27
ImageClient (HTML) (DMG) (ZIP)
Demonstrates how to use CFNetwork for synchronous and asynchronous operations, network diagnostics, proxy navigation, and authentication.
Networking Sample Code 2005-06-01
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.
Networking Technical Q&As 2003-10-28
Internet Config Reference (HTML) (PDF)
Describes the legacy technology for managing Internet preferences in Classic Mac OS.
Networking Reference 2003-05-01
Internet Connect Speed (HTML) (日本語 HTML)
QA1165: Describes how to get the modem connection speed from the System Configuration framework dynamic store.
Networking Technical Q&As 2003-03-26
IODeviceTree and the I/O Registry (HTML) (日本語 HTML)
QA1120: Describes the IODeviceTree plane in the Mac OS X I/O Registry.
Networking Technical Q&As 2008-09-18
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.
Networking Technical Q&As 2002-01-15
Kerberos GSS (HTML) (DMG) (ZIP)
Kerberos GSS-API Sample
Networking Sample Code 2008-06-04
Kernel Core Dumps (HTML)
TN2118: Explains how to gather and use remote kernel core dumps.
Networking Technical Notes 2008-11-12
KPI Reference (HTML)
Provides information on the NKE Sustainable API in Headerdoc format.
Networking Reference 2006-07-17
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.
Networking Technical Q&As 1999-10-11
Leopard Technology Series for Developers: OS Foundations (HTML)
Leopard Overview article on system-level updates.
Networking Articles 2007-09-04
ListMania (HTML) (DMG) (ZIP)
Demonstrates a variety of techniques for using Open Transport's list utility routines.
Networking Sample Code 2003-01-14
Living in a Dynamic TCP/IP Environment (HTML) (日本語 HTML)
TN1145: Describes some of the intricacies of dealing with TCP/IP in a dynamic environment, such as Open Transport.
Networking Technical Notes 2002-08-27
LocalServer (HTML) (DMG) (ZIP)
Deprecated - Sample demonstrates how a Classic process can communicate with a Mac OS X process using IP networking protocols.
Networking Sample Code 2003-01-30
LSMSmartCategorizer (HTML) (DMG) (ZIP)
Demonstrates the Latent Semantic Mapping (LSM) framework by automatically categorize RSS feeds.
Networking Sample Code 2007-05-09
Mac OS X Security Configuration Guide (PDF)
Describes how to configure Mac OS X to enhance security.
Networking Guides 2008-06-09
Mac OS X Server Administrator Topics (HTML) (PDF)
Document that describes a variety of server administrator advanced operations.
Networking Guides 2007-05-23
Mac OS X Server Command-Line Administration (PDF)
Explains how to use commands and configuration files to perform server administration tasks in a UNIX command shell.
Networking Guides 2007-12-11
Mac OS X Server High Availability Administration (PDF)
Explains how to manage IP failover, link aggregation, and load balancing to ensure high availability of services.
Networking Guides 2005-04-29
Mac OS X Server Network Services Administration (PDF)
Explains how to set up, configure, and administer DHCP, DNS, VPN, NTP, IP firewall, and NAT services on the server.
Networking Guides 2008-06-09
Mac OS X Server Podcast Producer Administration (PDF)
Explains how to set up and manage Podcast Producer service to record, process, and distribute podcasts.
Networking Guides 2007-10-31
Mac OS X Server Podcast Producer Workflow Tutorial (PDF)
Explains how to develop and customize Podcast Producer workflows.
Networking Guides 2008-06-09
Mac OS X Server Security Configuration Guide (PDF)
Describes how to configure Mac OS X Server to enhance server and service security.
Networking Guides 2008-06-09
Mac OS X Server System Image and Software Update Administration (PDF)
Explains how to use network-resident startup disks and how to set up a software update server.
Networking Guides 2007-10-31
Mac OS X Server Xgrid Administration and High Performance Computing (PDF)
Explains how to set up and manage computational clusters of Xserve systems and Mac computers.
Networking Guides 2007-10-31
Mixing link-local IP addresses and routable IP addresses (HTML)
QA1357: Explains how to enable communication between devices with link-local addresses and devices with routable addresses.
Networking Technical Q&As 2005-07-06
MoreIsBetter (HTML) (DMG) (ZIP)
Library providing indispensable wrapers and workarounds for many areas of Mac OS programming.
Networking Sample Code 2003-10-27
MoreSCF (HTML) (DMG) (ZIP)
High-level wrapper around System Configuration framework, making common operations easy.
Networking Sample Code 2007-06-07
NameAndAddress (HTML) (DMG) (ZIP)
A single window utility that gets a host name from an IP address or an IP address from a hostname.
Networking Sample Code 2003-01-14
Network Device Driver Programming Guide (HTML) (PDF)
Background and task information about developing network drivers for Mac OS X.
Networking Guides 2008-03-11
Network Kernel Extensions (legacy) (HTML) (PDF)
Describes how to write a kernel extension for adding or modifying functionality of a networking stack (Mac OS X 10.3 and earlier).
Networking Guides 2006-10-03
Network Kernel Extensions Programming Guide (HTML) (PDF)
Describes how to write a kernel extension for adding or modifying functionality of a networking stack (Mac OS X 10.4 and later).
Networking Guides 2009-03-02
Network Services Location Manager (Legacy) (HTML) (PDF)
Deprecated - Explains how to have a Carbon application discover available network services.
Networking Guides 2006-05-23
NewsReader (HTML) (DMG) (ZIP)
Demonstrates use of the Publication Subscription framework to create a simple RSS reader application.
Networking Sample Code 2007-06-01
NoCopyReceives (HTML) (DMG) (ZIP)
Demonstrates using no-copy receives under Open Transport.
Networking Sample Code 2003-01-14
NSCachedURLResponse Class Reference (HTML) (PDF)
Describes a cached response to a URL load request.
Networking Reference 2008-05-02
NSHost Class Reference (HTML) (PDF)
Describes a representation of a network host.
Networking Reference 2007-03-24
NSHTTPCookie Class Reference (HTML) (PDF)
Describes an opaque set of data that represents state or configuration.
Networking Reference 2008-11-13
NSHTTPCookieStorage Class Reference (HTML) (PDF)
Describes a collection of cookies shared across all applications.
Networking Reference 2006-05-23
NSHTTPURLResponse Class Reference (HTML) (PDF)
Describes a response to an HTTP request.
Networking Reference 2006-05-23
NSInputStream Class Reference (HTML) (PDF)
Describes a read-only data stream.
Networking Reference 2007-04-05
NSL and how it relates to Bonjour (HTML)
QA1299: Explains the relationship between NSL and Bonjour.
Networking Technical Q&As 2003-09-18
NSLMiniBrowser (HTML) (DMG) (ZIP)
Deprecated - Uses the NSL API to find network services using SLP, NBP, and Directory Services.
Networking Sample Code 2003-01-14
NSMessagePort Class Reference (HTML) (PDF)
Describes an endpoint for distributed object connections or interprocess messaging.
Networking Reference 2006-05-23
NSMessagePortNameServer Class Reference (HTML) (PDF)
Describes a facility that accepts and returns message ports.
Networking Reference 2007-02-23
NSMutableURLRequest Class Reference (HTML) (PDF)
Describes a mutable request for a resource identified by a URL.
Networking Reference 2006-05-23
NSNetService Class Reference (HTML) (PDF)
Describes a network service that an application publishes or uses as a client.
Networking Reference 2009-04-08
NSNetServiceBrowser Class Reference (HTML) (PDF)
Describes a query for published network services.
Networking Reference 2009-04-08
NSNetServices and CFNetServices Programming Guide (HTML) (PDF)
Describes how to implement Bonjour in Cocoa or Carbon applications.
Networking Guides 2008-10-15
NSOutputStream Class Reference (HTML) (PDF)
Describes a write-only data stream.
Networking Reference 2009-01-06
NSSocketPort Class Reference (HTML) (PDF)
Describes a BSD socket for distributed object connections or raw messaging.
Networking Reference 2008-10-15
NSSocketPortNameServer Class Reference (HTML) (PDF)
Describes a registrar of named TCP/IP sockets.
Networking Reference 2007-02-26
NSStream Class Reference (HTML) (PDF)
Describes an interface for reading and writing data.
Networking Reference 2008-10-15
NSURL Additions Reference (HTML) (PDF)
Describes additions to support pasteboards.
Networking Reference 2006-05-23
NSURL Class Reference (HTML) (PDF)
Describes a string that uniquely identifies a resource.
Networking Reference 2009-02-04
NSURLAuthenticationChallenge Class Reference (HTML) (PDF)
Describes a challenge from a server requiring authentication from the client.
Networking Reference 2006-05-23