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Technical Q&As: Legacy Technologies
As Mac OS X evolves, its technologies and APIs change to meet the needs of users and developers. As part of this evolution, less efficient features, interfaces, and programming techniques are deprecated or retired in favor of newer ones. Apple makes these changes only when deemed absolutely necessary. A technology identified in the ADC Reference Library as deprecated has been superseded and may become unsupported in the future. A technology identified as unsupported is no longer available from Apple for use by developers. Legacy documents help developers understand legacy technologies, identify replacements, and update their products to run on current Apple platforms.

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Are the Name Registry device tree nodes unique? (HTML)
HW64: Discusses whether Name Registry nodes copied from the Open Firmware device tree are unique.
Deprecated 1999-10-11
Writing Native SCSI Disk Drivers for PowerMacs (HTML)
DV22.
Unsupported 1999-03-01
Making the ADBOp call from CFM-68K (HTML) ()
HW30.
Unsupported 1998-05-11
Determining the State of the Modern Memory Manager (HTML) ()
ME03.
Unsupported 1996-07-03
ATA Manager Events Clarified (HTML)
DV24.
Unsupported 1995-12-07
PCI Throughput Issues (HTML)
DV20.
Unsupported 1995-09-15
Disconnect/Retry (HTML)
HW07.
Unsupported 1995-07-15
Explicitly Forcing PCI Burst Transfers (HTML)
HW19.
Unsupported 1995-07-15
PCI Bus Performance with Memory Read and Memory Read Multiple Commands (HTML)
HW05.
Unsupported 1995-07-15
PCI Drivers: I/O Queue & KillIO (HTML)
HW17.
Unsupported 1995-07-15
Verifying the PCI Interface (HTML)
HW21.
Unsupported 1995-07-15
ANSI SCSI Standards (HTML)
DV03: Describes past Macintosh systems that did not fully support the ANSI SCSI-1 standard.
Deprecated 1995-07-01
File Corruption with SCSI Manager 4.3 (HTML)
DV06.
Unsupported 1995-07-01
Getting a List of Drivers & LUNs (logical unit numbers) (HTML)
DV04: Describes a legacy Mac OS technique for obtaining a list of SCSI Parallel drivers, devices, and LUNs.
Deprecated 1995-07-01
Macintosh Quadra SCSI Data Transfer (HTML)
DV10.
Unsupported 1995-07-01
Synchronous SCSI Operation (HTML)
DV14.
Unsupported 1995-07-01
Using Standard SCSI Disk Drives on Macs (HTML)
DV16.
Unsupported 1995-07-01
NuBus Timing Problem (HTML)
HW03.
Unsupported 1995-05-01