Mac OS X 10.0
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Mac OS X 10.0

Mac OS X 10.0
A version of the macOS operating system
DeveloperApple Computer, Inc.
OS family
Source modelClosed, with open source components
Released to
March 24, 2001; 20 years ago (2001-03-24)[1]
Latest release10.0.4 / June 22, 2001; 20 years ago (2001-06-22)[2]
Kernel typeHybrid (XNU)
LicenseApple Public Source License (APSL) and Apple end-user license agreement (EULA)
Preceded byMac OS X Public Beta
Mac OS 9
Succeeded byMac OS X 10.1
Official websiteApple - Mac OS X at the Wayback Machine (archived June 29, 2001)
Support status
Historical, unsupported as of November 13, 2006

Mac OS X 10.0 (code named Cheetah) is the first major release and version of macOS, Apple's desktop and server operating system. Mac OS X 10.0 was released on March 24, 2001 for a price of US$129. It was the successor of the Mac OS X Public Beta and the predecessor of Mac OS X 10.1 (code named Puma).

Mac OS X 10.0 was a radical departure from the classic Mac OS and was Apple's long-awaited answer for a next generation Macintosh operating system. It introduced a brand new code base completely separate from Mac OS 9's as well as all previous Apple operating systems, and had a new Unix-like core, Darwin, which features a new memory management system. Unlike releases of Mac OS X 10.2 to 10.8, the operating system was not externally marketed with the name of a big cat.

System requirements


  • Dock -- the Dock was a new way of organizing one's Mac OS X applications on a user interface, and a change from the classic method of Application launching in previous Mac OS systems.
  • OSFMK 7.3 -- the Open Software Foundation Mach kernel from the OSF[3] was part of the XNU kernel for Mac OS X, and was one of the largest changes from a technical standpoint in Mac OS X.
  • Terminal -- the Terminal was a feature that allowed access to Mac OS X's underpinnings, namely the Unix core. Mac OS had previously had the distinction of being one of the few operating systems with no command line interface at all.[]
  • Mail -- email client.
  • Address Book
  • TextEdit -- new on-board word processor, replacement to SimpleText.
  • Full preemptive multitasking support, a long-awaited feature on the Mac.
  • PDF Support (create PDFs from any application)
  • Aqua UI -- new user interface
  • Built on Darwin, a Unix-like operating system.
  • OpenGL
  • AppleScript
  • Support for Carbon and Cocoa APIs
  • Sherlock -- desktop and web search engine.
  • Protected memory -- memory protection so that if an application corrupts its memory, the memory of other applications will not be corrupted.


Multilingual snags

Mac OS X 10.0 began a short era (that ended with Mac OS X 10.2 Jaguar's release) where Apple offered two types of installation CDs: 1Z and 2Z CDs. The difference in the two lay in the extent of multilingual support.

Input method editors of Simplified Chinese, Traditional Chinese, and Korean were only included with the 2Z CDs. They also came with more languages (the full set of 15 languages), whereas the 1Z CDs came only with about eight languages and could not actually display simplified Chinese, traditional Chinese and/or Korean (except for the Chinese characters present in Japanese Kanji). A variant of 2Z CDs were introduced when Mac OS X v10.0.3 was released to the Asian market (this variant could not be upgraded to version 10.0.4). The brief period of multilingual confusion ended with the release of v10.2.[] Currently, all Mac OS X installer CDs and preinstallations include the full set of 15 languages and full multilingual compatibility.

Release history

Version Build Date OS name Notes
10.0 4K78 March 24, 2001 Darwin 1.3.1 Original retail CD-ROM release
10.0.1 4L13 April 14, 2001 Apple: Mac OS X 10.0: Software Update 1.3.1, 10.0.1 Update, and Epson Printer Driver Update Provide Feature Enhancement, Address Issues
10.0.2 4P12 May 1, 2001
10.0.3 4P13 May 9, 2001 Update and Before You Install Information
10.0.4 4Q12 June 21, 2001 Apple: 10.0.4 Update and Before You Install Information


  1. ^ "Mac OS X Hits Stores This Weekend" (Press release). Apple Inc. March 21, 2001.
  2. ^ "Mac OS X Update 10.0.4". Archived from the original on April 11, 2004.
  3. ^ Jim Magee. WWDC 2000 Session 106 - Mac OS X: Kernel. 14 minutes in.
  4. ^ "Mac OS X 10.0: Connecting to AppleShare or File Sharing Requires TCP/IP". September 18, 2003. Retrieved 2010.

External links

Preceded by
Mac OS 9
Mac OS X 10.0 (Cheetah)
Succeeded by
Mac OS X 10.1 (Puma)

  This article uses material from the Wikipedia page available here. It is released under the Creative Commons Attribution-Share-Alike License 3.0.



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