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Date |
Generating a Non-Maskable Interrupt (NMI)
(HTML)
( )
QA1264: Explains how to generate a non-maskable interrupt (NMI) on modern Macintosh systems.
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Technical Q&As |
2008-10-13
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Programmatically causing restart, shutdown and/or logout
(HTML)
()
QA1134: Describes how to programmatically cause restart, shutdown, sleep or logout.
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Technical Q&As |
2008-09-24
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IODeviceTree and the I/O Registry
(HTML)
()
QA1120: Describes the IODeviceTree plane in the Mac OS X I/O Registry.
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Technical Q&As |
2008-09-18
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Disabling Processor Cores on a Multi-Core System
(HTML)
()
QA1141: Describes how to disable processor cores on a multi-core system for testing purposes.
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Technical Q&As |
2008-09-16
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Xserve User's Guide
(PDF)
Explains how to install, operate, and update Xserve systems. Includes expansion and hardware specifications.
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Guides |
2008-06-09
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iMac Developer Note
(HTML)
Specifies the internal design, I/O features, and expansion capabilities of iMac computers introduced in April 2008.
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Guides |
2008-04-28
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RAM Expansion Developer Note
(HTML)
Details requirements of RAM modules for use in Mac computers.
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Guides |
2008-04-28
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15-Inch MacBook Pro Developer Note
(HTML)
Specifies the internal design, I/O features, and expansion capabilities of the 15-inch MacBook Pro computer introduced in February 2008.
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Guides |
2008-03-04
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17-Inch MacBook Pro Developer Note
(HTML)
Specifies the internal design, I/O features, and expansion capabilities of the 17-inch MacBook Pro computer introduced in February 2008.
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Guides |
2008-03-04
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Xserve G5 Developer Note
(HTML)
(PDF)
Specifies the internal design, I/O features, and expansion capabilities of the Xserve G5 computer introduced in January 2005.
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Guides |
2008-02-21
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PowerMac G4
(HTML)
(PDF)
Specifies the internal design, I/O features, and expansion capabilities of the PowerMac G4 introduced in January 2003.
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Guides |
2008-02-20
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Xserve Developer Note
(HTML)
Specifies the internal design, I/O features, and expansion capabilities of the 4-core and 8-core Xserve introduced in January 2008.
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Guides |
2008-02-08
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MacBook Air Developer Note
(HTML)
New document specifies internal design, I/O features, and expansion capabilities of the MacBook Air computer introduced in January 2008.
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Guides |
2008-01-18
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Mac Pro Developer Note
(HTML)
Specifies the internal design, I/O features, and expansion capabilities of the Mac Pro computers introduced in January 2008.
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Guides |
2008-01-09
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15-Inch MacBook Pro Developer Note
(HTML)
Specifies the internal design, I/O features, and expansion capabilities of the 15-inch MacBook Pro computer introduced in November 2007.
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Guides |
2007-12-14
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17-inch MacBook Pro Developer Note
(HTML)
Specifies the internal design, I/O features, and expansion capabilities of the 17-inch MacBook Pro computer introduced in November 2007.
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Guides |
2007-12-14
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Apple Xserve Diagnostics User's Guide
(PDF)
New document that explains how to use Apple Xserve Diagnostics tool to test server hardware.
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Guides |
2007-12-04
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MacBook Developer Note
(HTML)
Specifies the internal design, I/O features, and expansion capabilities of the MacBook computer introduced in November 2007.
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Guides |
2007-11-10
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iMac Developer Note
(HTML)
Specifies the internal design, I/O features, and expansion capabilities of iMac computers introduced in August 2007.
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Guides |
2007-08-07
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15-inch MacBook Pro Developer Note
(HTML)
Specifies the internal design, I/O features, and expansion capabilities of the 15-inch MacBook Pro computer introduced in June 2007.
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Guides |
2007-06-11
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17-inch MacBook Pro Developer Note
(HTML)
Specifies the internal design, I/O features, and expansion capabilities of the 17-inch MacBook Pro computer introduced in June 2007.
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Guides |
2007-06-11
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SMARTQuery
(HTML)
(DMG)
(ZIP)
Demonstration of how to access and use S.M.A.R.T. disk monitoring functionality
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Sample Code |
2007-05-30
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MacBook Developer Note
(HTML)
Specifies the internal design, I/O features, and expansion capabilities of the MacBook computer introduced in May 2007.
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Guides |
2007-05-17
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15-inch MacBook Pro Developer Note
(HTML)
Specifies the internal design, I/O features, and expansion capabilities of the 15-inch MacBook Pro computer introduced in October 2006.
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Guides |
2007-05-03
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15-inch MacBook Pro Developer Note
(HTML)
Specifies the internal design, I/O features, and expansion capabilities of the 15-inch MacBook Pro computer introduced in October 2006.
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Guides |
2007-05-03
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iMac Developer Note
(HTML)
Specifies the internal design, I/O features, and expansion capabilities of iMac computers with SuperDrive introduced September 2006.
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Guides |
2007-05-03
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Mac Pro Developer Note
(HTML)
Specifies the internal design, I/O features, and expansion capabilities of the Mac Pro computer introduced in August 2006.
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Guides |
2007-05-03
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Mac Pro Developer Note
(HTML)
Specifies the internal design, I/O features, and expansion capabilities of the Mac Pro computers introduced in April 2007.
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Guides |
2007-04-05
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17-inch MacBook Pro Developer Note
(HTML)
Specifies the internal design, I/O features, and expansion capabilities of the 17-inch MacBook Pro computer introduced in October 2006.
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Guides |
2007-04-04
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iMac Developer Note
(HTML)
Specifies the internal design, I/O features, and expansion capabilities of the iMac computer introduced in January 2006.
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Guides |
2007-04-04
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Mac mini Developer Note
(HTML)
Specifies the internal design, I/O features, and expansion capabilities of the Mac mini computer introduced in February 2006.
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Guides |
2007-04-04
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MacBook Developer Note
(HTML)
Specifies the internal design, I/O features, and expansion capabilities of the MacBook computer introduced in May 2006.
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Guides |
2007-04-04
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MacBook Developer Note
(HTML)
Specifies the internal design, I/O features, and expansion capabilities of the MacBook computer introduced in November 2006.
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Guides |
2007-04-04
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17-inch MacBook Pro Developer Note
(HTML)
Specifies the internal design, I/O features, and expansion capabilities of the 17-inch MacBook Pro computer introduced in April 2006.
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Guides |
2007-04-03
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Power Mac G5 Developer Note
(HTML)
Specifies the internal design, I/O features, and expansion capabilities of the Power Mac G5 introduced in October 2005.
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Guides |
2007-03-06
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Xserve Developer Note
(HTML)
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Guides |
2007-01-12
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Thermal considerations for Mac Pro FB-DIMMs
(HTML)
TN2156: Design considerations and specifications for the AMB and Heat spreader for the Mac Pro
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Technical Notes |
2006-11-10
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17-inch iMac for Education Developer Note
(HTML)
Specifies the internal design, I/O features, and expansion capabilities of the 17-inch iMac for Education computer introduced in July 2006.
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Guides |
2006-11-07
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iMac Developer Note
(HTML)
Specifies the internal design, I/O features, and expansion capabilities of iMac computers with Combo drive introduced September 2006.
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Guides |
2006-09-07
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iMac G5 Developer Note
(HTML)
Specifies the internal design, I/O features, and expansion capabilities of the iMac G5 computer introduced in October 2005.
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Guides |
2006-04-07
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The "packages" node in the device tree
(HTML)
HW90: Describes the "packages" node in the Open Firmware device tree.
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Technical Q&As |
2006-02-22
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15-inch PowerBook G4 Developer Note
(HTML)
(PDF)
Specifies the internal design, I/O features, and expansion capabilities of the 15-inch PowerBook G4 introduced in October 2005.
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Guides |
2005-10-27
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17-inch PowerBook G4 Developer Note
(HTML)
(PDF)
Specifies the internal design, I/O features, and expansion capabilities of the 17-inch PowerBook G4 introduced in October 2005.
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Guides |
2005-10-19
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iBook Developer Note
(HTML)
(PDF)
Specifies the internal design, I/O features, and expansion capabilities of the iBook G4 computer introduced in July 2005.
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Guides |
2005-07-26
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eMac Developer Note
(HTML)
(PDF)
Specifies the internal design, I/O features, and expansion capabilities of the eMac computer introduced in May 2005.
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Guides |
2005-05-03
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iMac G5 Developer Note
(HTML)
(PDF)
Specifies the internal design, I/O features, and expansion capabilities of the iMac G5 introduced in May 2005.
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Guides |
2005-05-03
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Power Mac G5 Developer Note
(HTML)
(PDF)
Specifies the internal design, I/O features, and expansion capabilities of the Power Mac G5 introduced in April 2005.
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Guides |
2005-04-29
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Mac mini Developer Note
(HTML)
(PDF)
Specifies the internal design, I/O features, and expansion capabilities of the Mac mini introduced January 2005.
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Guides |
2005-04-05
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12-inch PowerBook G4 Developer Note
(HTML)
(PDF)
Specifies the internal design, I/O features, and expansion capabilities of the 12-inch PowerBook G4 introduced in January 2005.
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Guides |
2005-02-04
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Xserve G5 PCI Hardware RAID Card
(PDF)
Explains how to install the card in an Xserve G5 and how to set up a RAID volume.
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Guides |
2005-01-03
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Xserve G5 Quick Start
(PDF)
Explains where to find information for installing, setting up, using, and monitoring Xserve G5 systems.
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Guides |
2005-01-03
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Xserve G5 Using the Hardware RAID PCI Card
(PDF)
Explains how to use the software provided with the Hardware RAID PCI Card to configure and manage RAID operations.
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Guides |
2005-01-03
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Xserve G5 Using Xserve Remote Diagnostics
(PDF)
Explains how to use the Xserve Remote Diagnostics tool to test server hardware.
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Guides |
2005-01-03
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Xserve RAID User's Guide
(PDF)
Explains how to install the Xserve RAID system, connect it to a host system, and configure RAID storage.
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Guides |
2005-01-03
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Power Mac G5 -- Single Processor Developer Note
(HTML)
(PDF)
Specifies the internal design, I/O features, and expansion capabilities of the single processor Power Mac G5 introduced October 2004.
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Guides |
2004-10-19
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DDR SDRAM ICs for PowerBooks and iBooks that use Memory bus slewing
(HTML)
QA1344: Specifies DDR SDRAM IC optimization for PowerBooks and iBooks that use Memory bus slewing.
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Technical Q&As |
2004-03-18
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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.
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Technical Q&As |
2003-10-28
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CPUGestalt
(HTML)
(DMG)
(ZIP)
Deprecated - Shows how to determine the processor type of the Macintosh you're running on.
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Sample Code |
2003-10-27
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Sleep vs. Doze on Mac OS X
(HTML)
QA1309: Discusses and demonstrates sleep versus doze detection on Machintosh Mac OS X
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Technical Q&As |
2003-10-09
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SDRAM Problems With Self-Powered USB Devices
(HTML)
()
HW82: Alerts that non-compliant, self-powered USB devices plugged into a G4, can cause problems with low-voltage-sensitive SDRAM .
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Technical Q&As |
2003-08-21
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Bluetooth Radio Power Class for Apple Systems
(HTML)
()
QA1278: Notes Preferred Bluetooth Transmitter Characteristics for products designed for Apple Systems.
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Technical Q&As |
2003-08-06
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DRAM DIMM power pin connections for Macintosh Computers
(HTML)
()
QA1271: Discusses design considerations for DRAM DIMM power pin connections for Macintosh Computers.
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Technical Q&As |
2003-07-04
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I/O Kit Power Controller
(HTML)
()
TN2076: Describes code to include in a KEXT in order to register for power management events.
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Technical Notes |
2003-06-20
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Power adapter Sensing for the 17" PowerBook
(HTML)
()
QA1266: Details Design and detection considerations for 17-inch PowerBook power adapters
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Technical Q&As |
2003-06-12
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Empty Memory Objects
(HTML)
()
QA1259: Describes how two memory management edge cases are handled by the common Mac OS memory allocators.
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Technical Q&As |
2003-04-21
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Faster DDR DRAM in the 867MHz Power Mac G4 (Mirrored Drive Doors)
(HTML)
()
QA1191: Confirms the use of faster DDR DRAM in the 867MHz Power Mac G4 (Mirrored Drive Doors).
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Technical Q&As |
2002-08-19
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PC100 SDRAM DIMMs on the Flat Panel iMac
(HTML)
()
QA1130: Describes PC100 SDRAM DIMM limitations on the "original " Flat Panel iMac.
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Technical Q&As |
2002-03-18
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Power Management; Policy Maker vs. Power Controller
(HTML)
()
QA1121: Describes the differences between a Power Management Policy Maker and a Power Management Power Controller.
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Technical Q&As |
2002-02-13
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Working with Configuration Variables
(HTML)
()
QA1119: Explains how to delete a specific Open Firmware configuration variable without using Command-Option-P-R.
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Technical Q&As |
2002-02-13
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Energy Star PCI Device
(HTML)
()
QA1108: Provides useful information for developers of Energy Star-compliant PCI devices.
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Technical Q&As |
2002-01-15
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IOKit Framework Headers
(HTML)
()
QA1107: Describes the differences between the headers in IOKit.framework and the I/O Kit headers in Kernel.framework.
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Technical Q&As |
2002-01-15
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Menu Bar Clock and NVRAM
(HTML)
QA1102: Explains why booting with the Command-Option-P-R keys doesn't reset date and time preferences.
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Technical Q&As |
2001-12-21
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Resetting NVRAM to factory defaults
(HTML)
QA1103: Describes what happens when you boot holding the Command-Option-P-R keys.
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Technical Q&As |
2001-12-21
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Reducing the size of Physical Memory in Open Firmware
(HTML)
QA1099: Describes how to configure the Power Macintosh so less memory is recognized than is actually present.
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Technical Q&As |
2001-12-20
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SDRAM, CAS Latency for the
(HTML)
QA1071: Describes the supported CAS Latency values for the "QuickSilver", PowerMac G4 CPUs.
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Technical Q&As |
2001-09-13
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Determining RAM size & location in New World Machines
(HTML)
QA1065: Demonstrates Open Firmware method of determining RAM size & location in New World Machines.
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Technical Q&As |
2001-08-01
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128Mb SDRAM ICs limitation on original "Bronze Keyboard" Powerbook G3
(HTML)
QA1040: Outlines Memory ICs design limitation on original "Bronze Keyboard" Powerbook G3.
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Technical Q&As |
2001-06-21
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Displaying PCI Configuration Registers contents in Open Firmware
(HTML)
QA1036: Demonstrates how to display PCI Configuration Resister contents in Open Firmware.
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Technical Q&As |
2001-05-18
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Open Firmware Memory bus speed
(HTML)
HW97: Describes a method to display memory bus speed for G3 or G4 Macintosh in Open Firmware.
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Technical Q&As |
2000-09-22
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Open Firmware version number
(HTML)
HW96: Discusses the unique values of Open Firmware version numbers.
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Technical Q&As |
2000-09-22
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The "chosen" node in the device tree
(HTML)
HW88: Describes how to find the "chosen" node in the Open firmware device tree.
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Technical Q&As |
2000-09-05
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The "green" PCI bus
(HTML)
HW93: Explains why the PCI bus is considered "green".
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Technical Q&As |
2000-09-05
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Open Firmware device tree nodes
(HTML)
HW86: Explains the usage of the "@n" notation in Open Firmware device tree nodes.
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Technical Q&As |
2000-09-05
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PCI class codes
(HTML)
HW91: Explains why PCI class codes are important.
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Technical Q&As |
2000-09-05
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PCI Macintoshes and CardBus controllers
(HTML)
HW87: Explains why older PCI Macintoshes do not recognize a Cardbus controller.
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Technical Q&As |
2000-09-05
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Power Manager 2.0
(HTML)
()
TN1190: Describes the Macintosh Power Manager 2.0.
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Technical Notes |
2000-08-14
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Maximum Memory for the "Firewire" PowerBook
(HTML)
Deprecated - HW83: Discrepancies between PowerBook Developer Note and TIL articles 14870 and 58582, regarding maximum memory configurations.
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Technical Q&As |
2000-03-13
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A SCSI little secret
(HTML)
HW81: Details what to expect when accessing the motherboard SCSI bus on the Blue & White G3.
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Technical Q&As |
1999-12-20
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PCI Header types
(HTML)
HW78: Describes the three required types of PCI headers to be provided in its configuration header space.
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Technical Q&As |
1999-11-15
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Explanation of SDRAM configuration Nomenclature
(HTML)
HW75: Explains the three-part "Device configuration" numbers for SDRAM in the Power Mac G4 Computer Developer Note.
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Technical Q&As |
1999-10-18
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Are the Name Registry device tree nodes unique?
(HTML)
Deprecated - HW64: Discusses whether Name Registry nodes copied from the Open Firmware device tree are unique.
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Technical Q&As |
1999-10-11
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How do I change the numeric base for the Open Firmware user interface?
(HTML)
HW66: Explains how to change the numeric base for the Open Firmware user interface.
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Technical Q&As |
1999-10-11
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How do I determine the top of the Open Firmware dictionary?
(HTML)
HW69: Explains how to determine the top of the Open Firmware dictionary.
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Technical Q&As |
1999-10-11
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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".
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Technical Q&As |
1999-10-11
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Detecting specific ROM-in-RAM Mac
(HTML)
()
Deprecated - HW49: Identifying a Mac by name ("iMac"), and better alternatives for determining specific features ("has Firewire").
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Technical Q&As |
1999-10-05
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Which Machines Support Driver Services Library and the MP Nanokernel?
(HTML)
()
HW63: Lists the systems that do and don't support the Driver Services Library and the MP Nanokernel.
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Technical Q&As |
1999-07-12
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The AAPL, slot-name property and PCI
(HTML)
()
HW61: Discusses the use of the AAPL,slot name property for PCI
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Technical Q&As |
1999-04-19
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Determining the version of Open Firmware on your Mac
(HTML)
()
HW60: Describes a method to display the version of Open Firmware on a Macintosh.
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Technical Q&As |
1999-03-29
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dl command in 1 machine mode
(HTML)
()
HW51: Describes using the "dl" command in 1 machine mode.
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Technical Q&As |
1999-03-29
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Stopping Forth command scrolls
(HTML)
()
HW57: Describes how to limit Forth commands from scrolling off the screen.
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Technical Q&As |
1999-03-29
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Booting after invoking the Open Firmware user interface
(HTML)
()
HW48: Tells how to boot a system after entering the Open Firmware user interface.
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Technical Q&As |
1999-02-15
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Difference between using Restart or Shut Down in the Finder's Special menu in Open Firmware
(HTML)
()
HW47: Explains the differences between using Restart or Shut Down on Open Firmware
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Technical Q&As |
1999-02-15
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Do PowerBooks have a PCI bus?
(HTML)
()
HW43: Explains that a Powerbook has a PCI bus.
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Technical Q&As |
1999-02-15
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How does Open Firmware generate the name property?
(HTML)
()
HW39: Describes the Open Firmware name property generation process.
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Technical Q&As |
1999-02-15
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Invoking the Open Firmware user interface
(HTML)
()
HW45: Describes how to invoke the Open Firmware user interface on startup.
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Technical Q&As |
1999-02-15
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PCI bus on the iMac
(HTML)
()
HW42: Explains that the iMac has a PCI bus even though it has no expansion slots.
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Technical Q&As |
1999-02-15
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What are configuration variables in Open Firmware?
(HTML)
()
HW38: Defines the configuration variables in Open Firmware.
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Technical Q&As |
1999-02-15
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What are snag keys in Open Firmware?
(HTML)
()
HW35: Explains Open Firmware snag keys, including examples of their function.
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Technical Q&As |
1999-02-15
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What is meant by 1 machine mode vs. 2 machine mode with respect to Open Firmware?
(HTML)
()
HW36: Documents 1 machine mode vs. 2 machine mode in Open Firmware.
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Technical Q&As |
1999-02-15
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PrepareMemoryForIO in the NewWorld
(HTML)
DV33: Explains the correct use of PrepareMemoryForIO on DMA buffers when writing a device driver for DMA software.
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Technical Q&As |
1998-12-07
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High-Speed SDRAM Design Considerations
(HTML)
()
TN1138: Illustrates certain issues with the design of high-speed SDRAM DIMM modules.
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Technical Notes |
1998-08-01
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OTScheduleDeferredTask When Task Running
(HTML)
()
NW52: Describes what happens when you use OTScheduleDefferedTask to schedule a task that is running.
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Technical Q&As |
1997-10-13
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Detecting a CD-ROM
(HTML)
()
DV18: Demonstrates CD-ROM drive detection.
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Technical Q&As |
1997-01-31
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Fundamentals of Open Firmware, Part II: The Device Tree
(HTML)
TN1062: Describes the Open Firmware device tree.
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Technical Notes |
1996-09-01
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DR Emulator Caches
(HTML)
()
Deprecated - HW28: Describes the Dynamic Recompiling emulator's cache, including a description of when to flush the cache.
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Technical Q&As |
1996-04-08
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All Hardware Products
(HTML)
A list of links to all Apple hardware developer notes.
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Guides |
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