Version RecordIndependent release archive
Menu

Release record

macOS 10.0

Cheetah

Full article
Public release
Recorded milestones
1
Beta cycle
—
Average interval
—
Public release
Mar 24, 2001

Release notes

Overview

Editorial synthesis with inline references and a source ledger when citations are available.

Release overview

Mac OS X 10.0 became publicly available in stores on March 24, 2001. The release established Apple's new desktop operating-system line around a Darwin UNIX foundation, protected process behavior, Quartz graphics, Aqua, native and transitional application frameworks, and internet-oriented services.[1][2]

System architecture

Darwin supplied the open-source UNIX base, with protected memory, preemptive multitasking, and symmetric multiprocessing on supported dual-processor Macs. Quartz, OpenGL, QuickTime, Java 2, BSD services, and web technologies formed the major graphics, media, runtime, and server-facing layers.[3][4]

Interface and application transition

Aqua and the Dock introduced a different interaction and visual model. Apple paired that break with three application paths: Classic for much existing software through Mac OS 9.1, Carbon for adapted Mac applications, and Cocoa for software written around the new native object-oriented framework.[5][6]

Internet, media, and services

The shipping system included Mail, Internet Explorer 5.1 Preview, QuickTime Player, and Sherlock, plus iTools and iDisk integration. QuickTime 5 was part of the operating system, while Apple offered iMovie 2, iTunes, and an AppleWorks preview as separate March 24 downloads rather than representing them here as bundled 10.0 changes.[7][8]

Memory, power, and networking

Dynamic memory allocation removed manual per-application sizing, portable power management revised wake behavior, and automatic networking reduced connection reconfiguration. A unified network interface included direct support for PPPoE-based DSL services.[9]

Fonts, printing, accounts, and security

The launch package supported TrueType, Type 1, and OpenType fonts, included a substantial font collection, and bundled printer support for selected HP, Canon, and Epson devices. Multi-user privileges and Kerberos-backed file and network security were documented as launch capabilities; they are not presented as individual vulnerability fixes.[10][11]

Package and hardware

The US retail price was $129. One CD carried seven languages, and the box also included Mac OS 9.1 and developer tools. Apple's final launch baseline required 128MB of memory and listed supported G3 and G4 Mac families, including PowerBooks introduced after May 1998.[12]

Beta, maintenance, and security boundary

Apple's September 2000 Public Beta informed changes to the Dock, Desktop, Finder, and networking, but it is not an eligible local route in this batch. Apple's later May announcement identifies CD burning as part of 10.0.2, and the retained early-security chronology first names OpenSSH in 10.0.1 and FTP or NTP corrections in 10.0.2. None of those point-release changes is projected backward into the March 24 package.[13][14][15]

Launch ecosystem context

Apple reported more than 350 Mac OS X applications shipping immediately before launch and more than 10,000 developer organizations working on the platform. These are vendor-supplied ecosystem figures, not independent measures of application completeness or active use.[16]

Source ledger

References

Sources are linked to the claims they support. Publication and access dates are shown when available.

  1. Apple’s Mac OS X to Ship on March 24

    Apple Newsroom · Apple · 2001-01-09T00:00:00.000Z · January announcement and March 24 date

    Back to text ↑
  2. Mac OS X Hits Stores This Weekend

    Apple Newsroom · Apple · 2001-03-21T00:00:00.000Z · March 24 worldwide retail availability

    Back to text ↑
  3. Mac OS X Hits Stores This Weekend

    Apple Newsroom · Apple · 2001-03-21T00:00:00.000Z · Architecture and extended feature inventory

    Back to text ↑
  4. Apple’s Mac OS X to Ship on March 24

    Apple Newsroom · Apple · 2001-01-09T00:00:00.000Z · Architecture and feature inventory

    Back to text ↑
  5. Mac OS X Hits Stores This Weekend

    Apple Newsroom · Apple · 2001-03-21T00:00:00.000Z · Aqua and boxed Classic content

    Back to text ↑
  6. Apple’s Mac OS X to Ship on March 24

    Apple Newsroom · Apple · 2001-01-09T00:00:00.000Z · Aqua, Dock, Classic, Carbon, and Cocoa

    Back to text ↑
  7. Apple’s Mac OS X to Ship on March 24

    Apple Newsroom · Apple · 2001-01-09T00:00:00.000Z · Internet applications and services

    Back to text ↑
  8. Mac OS X Hits Stores This Weekend

    Apple Newsroom · Apple · 2001-03-21T00:00:00.000Z · QuickTime and separate Apple application downloads

    Back to text ↑
  9. Mac OS X Hits Stores This Weekend

    Apple Newsroom · Apple · 2001-03-21T00:00:00.000Z · Dynamic memory through network-management features

    Back to text ↑
  10. Mac OS X Hits Stores This Weekend

    Apple Newsroom · Apple · 2001-03-21T00:00:00.000Z · Fonts, printers, multi-user, and security features

    Back to text ↑
  11. Apple’s Mac OS X to Ship on March 24

    Apple Newsroom · Apple · 2001-01-09T00:00:00.000Z · Quartz font support

    Back to text ↑
  12. Mac OS X Hits Stores This Weekend

    Apple Newsroom · Apple · 2001-03-21T00:00:00.000Z · Pricing & Availability and requirements

    Back to text ↑
  13. Apple Releases Mac OS X Update with CD Burning

    Apple Newsroom · Apple · 2001-05-01T00:00:00.000Z · 10.0.2 and earlier 10.0 update boundary

    Back to text ↑
  14. Apple security updates (August, 2003 and earlier)

    Apple Support · Apple · 2026-07-30 · Mac OS X 10.0.1 and 10.0.2 entries

    Back to text ↑
  15. Apple’s Mac OS X to Ship on March 24

    Apple Newsroom · Apple · 2001-01-09T00:00:00.000Z · Public Beta feedback boundary

    Back to text ↑
  16. More than 10,000 Developers Working on Mac OS X Solutions

    Apple Newsroom · Apple · 2001-03-21T00:00:00.000Z · March 21 developer-ecosystem claims

    Back to text ↑
  17. Apple security updates (August, 2003 and earlier)

    Apple Support · Apple · 2026-07-30 · Initial-versus-point security boundary

  18. Apple’s Mac OS X to Ship on March 24

    Apple Newsroom · Apple · 2001-01-09T00:00:00.000Z · January 9 announcement

  19. Apple Releases Mac OS X Update with CD Burning

    Apple Newsroom · Apple · 2001-05-01T00:00:00.000Z · Later 10.0.2 boundary

  20. More than 10,000 Developers Working on Mac OS X Solutions

    Apple Newsroom · Apple · 2001-03-21T00:00:00.000Z · Launch ecosystem context

  21. Mac OS X Hits Stores This Weekend

    Apple Newsroom · Apple · 2001-03-21T00:00:00.000Z · March 24 public launch

Documented & observed

Changes in this version

Source-linked features, fixes, known issues, removals, and community-observed behavior recorded across this version’s appearances and verified builds.

Release changes

Changed in this release

Features, fixes, removals, and regressions first observed in this release record.

feature · introduced

Multi-user accounts and access privileges

documentedconfirmed

The system used account boundaries and permissions to separate users and protect their documents on a shared Mac.

Recorded at Public

  1. [1] Mac OS X Hits Stores This Weekend · Feature list; multi-user environment

compatibility · changed

Retail package and supported-Mac baseline

documentedconfirmed

The package carried seven languages on one CD and included Mac OS 9.1 plus developer tools. Apple's final launch notice covered iMac, iBook, Power Macintosh G3, Power Mac G4, Power Mac G4 Cube, and PowerBook models introduced after May 1998.

Recorded at Public

  1. [1] Apple’s Mac OS X to Ship on March 24 · January pricing and requirements
  2. [2] Mac OS X Hits Stores This Weekend · Pricing & Availability and system requirements

security · introduced

Kerberos and network-security foundation

documentedconfirmed

This occurrence records a documented launch capability, not a claim that the initial 10.0 package repaired a specific vulnerability.

Recorded at Public

  1. [1] Mac OS X Hits Stores This Weekend · Feature list; file-system and network security

feature · introduced

Dynamic application memory management

documentedconfirmed

Apple presented this as eliminating routine out-of-memory messages and the classic workflow of manually adjusting an application's memory allocation.

Recorded at Public

  1. [1] Mac OS X Hits Stores This Weekend · Feature list; dynamic memory management

enhancement · changed

Expanded font formats and management

documentedconfirmed

The launch package also included a large font collection and multilingual type resources; this occurrence records the platform capability rather than reproducing the promotional font catalog.

Recorded at Public

  1. [1] Mac OS X Hits Stores This Weekend · Feature list; font support and bundled fonts
  2. [2] Apple’s Mac OS X to Ship on March 24 · Quartz and broad font support

feature · introduced

Automatic networking and PPPoE controls

documentedconfirmed

The new networking model was designed to use available connections with less manual reconfiguration and to manage common network paths from one interface.

Recorded at Public

  1. [1] Mac OS X Hits Stores This Weekend · Feature list; automatic networking and network interface

feature · introduced

Bundled internet application suite

documentedconfirmed

Apple described Mail as compatible with common internet mail accounts and grouped the browser preview, media player, and Sherlock search utility into the shipping system's internet experience.

Recorded at Public

  1. [1] Apple’s Mac OS X to Ship on March 24 · Internet applications paragraph

compatibility · introduced

Built-in consumer printer support

documentedconfirmed

Apple identified those vendor families at launch but did not preserve a model-by-model compatibility matrix in the cited announcement.

Recorded at Public

  1. [1] Mac OS X Hits Stores This Weekend · Feature list; printer support

feature · introduced

Protected memory and preemptive multitasking

documentedconfirmed

The new foundation isolated process memory and let the operating system schedule running work, replacing cooperative assumptions from the classic Mac system architecture.

Recorded at Public

  1. [1] Apple’s Mac OS X to Ship on March 24 · Darwin foundation architecture paragraph
  2. [2] Mac OS X Hits Stores This Weekend · Darwin foundation architecture paragraph

developerApi · introduced

Darwin and BSD UNIX foundation

documentedconfirmed

Apple described Darwin beneath the client system and identified bundled facilities including common shells, Perl, FTP, Apache, WebDAV, and XML technologies. These capabilities form the operating-system foundation rather than a claim that every service was enabled by default.

Recorded at Public

  1. [1] Mac OS X Hits Stores This Weekend · Darwin foundation; web-development tools; BSD UNIX services
  2. [2] Apple’s Mac OS X to Ship on March 24 · Feature list and Darwin foundation paragraph

developerApi · introduced

Cocoa application API

documentedconfirmed

Apple positioned Cocoa as the advanced native framework for creating applications specifically around the new operating-system architecture.

Recorded at Public

  1. [1] Apple’s Mac OS X to Ship on March 24 · Feature list; Cocoa API

developerApi · introduced

Carbon application API

documentedconfirmed

Apple distinguished Carbon applications from unmodified software running through Classic: Carbon was the migration path for revised Mac code using the new system.

Recorded at Public

  1. [1] Apple’s Mac OS X to Ship on March 24 · Feature list; Carbon API

compatibility · introduced

Classic application environment

documentedconfirmed

The boxed package included Mac OS 9.1 for the Classic environment. Apple framed Classic as the compatibility path for existing software rather than native Mac OS X execution.

Recorded at Public

  1. [1] Apple’s Mac OS X to Ship on March 24 · Classic API and Mac OS 9.1 transition paragraphs
  2. [2] Mac OS X Hits Stores This Weekend · Pricing & Availability; Classic package content

enhancement · changed

Faster portable wake behavior

documentedconfirmed

The launch claim is retained as Apple's stated portable behavior, not as an independently benchmarked timing guarantee across every supported model.

Recorded at Public

  1. [1] Mac OS X Hits Stores This Weekend · Feature list; advanced power management

Milestones

Release history

Every recorded channel appearance in chronological order. Open an appearance for any available build, scope, notes, and sources.

  1. Public release

    Public

    Full articleEditorially verified

    The first public Mac OS X release reached worldwide retail on March 24, 2001 with a Darwin UNIX base, Aqua and the Dock, Quartz, Classic/Carbon/Cocoa transition paths, and a new internet-oriented desktop foundation.

    Availability
    available
    Sources
    49 linked
    Open this appearance

Historical context

Cycle comparison

Pace, intervals, and duration compared with earlier releases on the same platform.

Historical avg for major releases

122 days, 11.3 milestones

Based on 6 previous macOS .0 releases

Previous .0 releases (macOS)

Previous comparable macOS releases
VersionYearCycleMilestonesAvg. Interval
macOS 26.0202598d1110d
macOS 15.0202498d912d
macOS 14.02023113d1013d
macOS 13.02022140d1411d
macOS 12.02021140d1312d
macOS 11.02020143d1114d

Scroll horizontally to compare every historical field.

Official release notes