# macOS

> operating system for Apple computers

**Wikidata**: [Q14116](https://www.wikidata.org/wiki/Q14116)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/MacOS)  
**Source**: https://4ort.xyz/entity/macos

## Summary
macOS is the proprietary operating system developed by Apple Inc. for its line of Macintosh computers. First released on March 24, 2001, as Mac OS X, it is a UNIX 03-certified system based on Darwin and FreeBSD technologies. It is the successor to the Classic Mac OS and serves as the primary operating system for Apple's desktop and laptop computers.

## Key Facts
- **Initial Release:** March 24, 2001 (as Mac OS X 10.0 "Cheetah")
- **Developer:** Apple Inc.
- **License:** Proprietary license, Apple Public Source License
- **Based On:** Darwin, FreeBSD
- **Classification:** Proprietary operating system; certified as UNIX 03 since October 26, 2007.
- **Predecessors:** Replaced Classic Mac OS, NeXTSTEP, and Rhapsody.
- **Naming History:** Known as Mac OS X until 2012, OS X from 2012 to 2016, and macOS since 2016.
- **Supported Platforms:** Has run on PowerPC, x86-64, and AArch64 architectures.

## FAQs
### Q: Who makes macOS?
A: macOS is developed, marketed, and sold by Apple Inc., an American multinational technology company.

### Q: Is macOS a UNIX system?
A: Yes. Since the release of Mac OS X Leopard (10.5) on October 26, 2007, the operating system has been certified as compliant with the Single UNIX Specification, version 3 (UNIX 03).

### Q: What were the previous names for macOS?
A: The operating system was originally named Mac OS X from its release in 2001 until 2012. It was then rebranded as OS X, a name it held until 2016, when it was changed to macOS.

## Why It Matters
macOS is significant as one of the two dominant proprietary operating systems in the personal computing market, alongside Microsoft Windows. Its introduction marked a major technological shift for Apple, replacing the aging Classic Mac OS with a modern, stable, and secure system built on a robust UNIX foundation derived from NeXTSTEP and FreeBSD. This technical underpinning provided pre-emptive multitasking and memory protection, features that were critical for modern computing and which set the stage for Apple's resurgence.

The architecture and core components of macOS, particularly the Darwin layer, also served as the foundation for Apple's other successful operating systems, including iOS, iPadOS, watchOS, and tvOS. Its consistent, user-friendly graphical interface, powered by frameworks like Aqua and Cocoa, has been a key differentiator for the Mac platform, influencing design trends across the industry. The operating system's evolution reflects major shifts in computing, from the initial focus on desktop power to the integration of features inspired by mobile devices.

## Notable For
- **UNIX Foundation:** It is built on Darwin, an open-source, Unix-like core that includes components from FreeBSD and the Mach microkernel. Since 2007, it has been officially certified as a UNIX 03-compliant system.
- **Distinctive GUI:** macOS is known for its unique graphical user interface, historically defined by the Aqua toolkit and later by the Cocoa framework, which have provided a consistent and polished user experience.
- **Architectural Lineage:** The operating system directly replaced Apple's previous "Classic Mac OS" and was heavily influenced by NeXTSTEP, the object-oriented operating system developed by Steve Jobs's company NeXT.
- **Foundation for Other Apple OSes:** The core architecture of macOS was adapted to create iOS, the operating system for the iPhone, which in turn powers other Apple devices.
- **Primary Competitor to Windows:** In the desktop market, macOS is the main alternative to Microsoft Windows, creating a long-standing duopoly in proprietary personal computer operating systems.

## Body
### History and Naming
macOS was first released to the public on March 24, 2001. It was developed by Apple Inc. and founded by Steve Jobs. The operating system replaced Apple's previous systems, including Classic Mac OS, NeXTSTEP, and Rhapsody.

The product has undergone several name changes:
- **Mac OS X:** Used from its inception in 2001 until 2012.
- **OS X:** Used from 2012 until 2016.
- **macOS:** The current name, in use since 2016.

### Technical Foundation
The core of macOS is a Unix-like operating system named Darwin, which is based on components from FreeBSD and the Mach microkernel. This foundation provides robust performance and security. Since the release of version 10.5 Leopard on October 26, 2007, macOS has been certified as a UNIX 03 product.

- **Programming Languages:** Key languages used in its development include Objective-C and C++.
- **GUI Frameworks:** The distinctive look and feel of the user interface are provided by toolkits such as Aqua and Cocoa.
- **Influences:** The system was influenced by NeXT, OpenStep, Berkeley Software Distribution (BSD), FreeBSD, and OpenBSD.

### Versions and Platforms
macOS has a long history of major releases, many of which were named after big cats before transitioning to California landmarks.

**Early Versions (Mac OS X):**
- **10.0 (Cheetah):** March 24, 2001
- **10.1 (Puma):** September 25, 2001
- **10.2 (Jaguar):** August 24, 2002
- **10.3 (Panther):** October 24, 2003
- **10.4 (Tiger):** April 29, 2005
- **10.5 (Leopard):** October 26, 2007
- **10.6 (Snow Leopard):** August 28, 2009
- **10.7 (Lion):** July 20, 2011

**Later Versions (OS X and macOS):**
- **10.8 (Mountain Lion):** July 25, 2012
- **10.9 (Mavericks):** October 22, 2013
- Subsequent versions include Yosemite, El Capitan, Sierra, High Sierra, Mojave, Catalina, Big Sur, Monterey, Ventura, and Sonoma.

The operating system has supported multiple processor architectures, including PowerPC, x86-64 (Intel), and AArch64 (Apple silicon).

### Market Position
macOS is a proprietary operating system that competes directly with other desktop operating systems. Its primary competitor is Microsoft Windows and its various versions (e.g., Windows 7). It also competes with numerous Linux distributions such as Ubuntu, Fedora Linux, Linux Mint, and elementary OS.

## Schema Markup
```json
{
  "@context": "https://schema.org",
  "@type": "Thing",
  "name": "macOS",
  "description": "A proprietary operating system for Apple's line of Macintosh computers, developed and marketed by Apple Inc.",
  "url": "https://www.apple.com/os/macos/",
  "additionalType": "http://schema.org/SoftwareApplication",
  "developer": {
    "@type": "Organization",
    "name": "Apple Inc."
  },
  "dateCreated": "2001-03-24",
  "license": "proprietary license",
  "isBasedOn": ["Darwin", "FreeBSD"]
}

## References

1. [Source](https://www.opengroup.org/openbrand/register/)
2. [Source](http://www.opengroup.org/csq/search/t=XY1.html)
3. Virtual International Authority File
4. [Source](http://www.lextrait.com/Vincent/implementations.html)
5. [Source](https://www.apple.com/newsroom/2001/01/09Apples-Mac-OS-X-to-Ship-on-March-24/)
6. [Source](https://developer.apple.com/news/releases/?id=08172022b)
7. [Source](https://developer.apple.com/documentation/macos-release-notes/macos-13_1-release-notes)
8. [Source](https://developer.apple.com/documentation/macos-release-notes/macos-13_2-release-notes)
9. [Apple Releases macOS Ventura 13.4.1. 2023](https://www.macrumors.com/2023/06/21/apple-releases-macos-ventura-13-4-1/)
10. [Apple Seeds Second Beta of macOS 14 Sonoma. 2023](https://www.macrumors.com/2023/06/21/apple-seeds-macos-sonoma-14-beta-2/)
11. [Source](https://www.macrumors.com/2023/07/24/apple-releases-macos-ventura-13-5/)
12. [Source](https://www.macrumors.com/2023/07/31/second-macos-sonoma-public-beta/)
13. [Source](https://www.macrumors.com/2023/08/17/apple-releases-macos-ventura-13-5-1/)
14. [Source](https://www.macrumors.com/2023/08/30/apple-seeds-macos-sonoma-beta-7/)
15. [Source](https://www.macrumors.com/2023/09/21/apple-releases-macos-ventura-13-6/)
16. [Source](https://developer.apple.com/news/releases/?id=12192023d)
17. [Source](https://developer.apple.com/news/releases/?id=12122023c)
18. [macOS 14.4 (23E214) - Releases - Apple Developer](https://developer.apple.com/news/releases/?id=03072024d)
19. [macOS 14.4.1 (23E224) - Releases - Apple Developer](https://developer.apple.com/news/releases/?id=03252024a)
20. [Source](https://support.apple.com/en-us/HT214106)
21. [Source](https://developer.apple.com/news/releases/)
22. [Source](https://developer.apple.com/documentation/macos-release-notes/macos-15-release-notes)
23. [Source](https://support.apple.com/120283)
24. [Source](https://developer.apple.com/documentation/macos-release-notes/macos-15_1-release-notes)
25. [Source](https://appleinsider.com/articles/24/09/16/apple-releases-updates-for-ios-177-ipados-177-macos-ventura-and-sonoma)
26. [Apple Releases macOS Sequoia 15.1 With Apple Intelligence. 2024](https://www.macrumors.com/2024/10/28/apple-releases-macos-sequoia-15-1/)
27. [macOS Sequoia 15.2 Release Notes](https://developer.apple.com/documentation/macos-release-notes/macos-15_2-release-notes)
28. [Apple Releases macOS Sequoia 15.2 With New Apple Intelligence Features. 2024](https://www.macrumors.com/2024/12/11/apple-releases-macos-sequoia-15-2/)
29. [Apple Releases macOS Sequoia 15.3 With Genmoji. 2025](https://www.macrumors.com/2025/01/27/apple-releases-macos-sequoia-15-3/)
30. [Apple Releases macOS Sequoia 15.4 With Mail Categorization and More. 2025](https://www.macrumors.com/2025/03/31/apple-releases-macos-sequoia-15-4/)
31. [Apple Releases macOS Sequoia 15.5. 2025](https://www.macrumors.com/2025/05/12/apple-releases-macos-sequoia-15-5/)
32. [Source](https://www.macrumors.com/2025/09/15/apple-releases-macos-tahoe/)
33. Freebase Data Dumps. 2013
34. YSO-Wikidata mapping project
35. BabelNet
36. [Mac OS - Codex Gamicus - Humanity's collective gaming knowledge at your fingertips.](https://gamicus.fandom.com/wiki/Mac_OS)
37. [Source](https://thenextweb.com/vocabulary/macos/)
38. [Source](https://golden.com/wiki/MacOS-33KK)
39. KBpedia
40. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)
41. [macOS (Operating System) - SteamGridDB](https://www.steamgriddb.com/game/5269301)