# macOS Sierra

> 13th major version of the macOS operating system

**Wikidata**: [Q22095865](https://www.wikidata.org/wiki/Q22095865)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/MacOS_Sierra)  
**Source**: https://4ort.xyz/entity/macos-sierra

## Summary
macOS Sierra (version 10.12) is the 13th major release of Apple's macOS operating system for Macintosh computers. Released on September 20, 2016, it is the direct successor to OS X El Capitan and the first version to adopt the "macOS" branding to align with Apple's other software platforms.

## Key Facts
- **Developer:** Apple Inc.
- **Initial Release Date:** September 20, 2016
- **Version Number:** 10.12 (Major)
- **Final Stable Version:** 10.12.6 (Released July 9, 2018)
- **Preceded By:** OS X El Capitan
- **Succeeded By:** macOS High Sierra
- **Core Architecture:** Based on the Darwin operating system
- **Certification:** Certified as UNIX 03 compliant (Single UNIX Specification)
- **License:** Apple Public Source License
- **Distribution:** Digital distribution via the Mac App Store

## FAQs
### Q: What was the most significant new feature in macOS Sierra?
A: The most notable feature introduced in macOS Sierra was the integration of Siri, Apple's intelligent personal assistant, which was previously exclusive to other Apple operating systems like iOS.

### Q: Why did Apple change the name from OS X to macOS?
A: The rebranding to macOS Sierra was intended to unify the naming convention of the Mac operating system with Apple's other platforms, such as iOS, watchOS, and tvOS.

### Q: What are the technical foundations of macOS Sierra?
A: macOS Sierra is built on the Darwin operating system and utilizes the Aqua graphical user interface toolkit. It is officially recognized as a UNIX 03 operating system under the Single UNIX Specification.

### Q: When did macOS Sierra receive its final update?
A: The final stable version of macOS Sierra, version 10.12.6, was released on July 9, 2018.

## Why It Matters
macOS Sierra represents a significant branding and functional milestone in the history of Apple’s desktop software. By transitioning the name from "OS X" to "macOS," Apple brought its longest-running software line into visual and nomenclature alignment with its mobile and wearable ecosystems. This shift signaled a more integrated approach to the Apple user experience, emphasizing continuity across devices.

Technically, Sierra maintained the robust foundations of its predecessors, being built on Darwin and achieving UNIX 03 certification. The introduction of Siri to the desktop environment was a major step in expanding Apple's artificial intelligence capabilities, allowing users to interact with their computers using voice commands for file searches and system tasks. Furthermore, the release solidified Apple's commitment to digital-only distribution through the App Store, moving away from physical media entirely. As the 13th major version, it served as a bridge between the legacy era of Mac OS X and the modern era of macOS, providing a stable platform for both consumer electronics and professional software development.

## Notable For
- **Branding Transition:** It was the first version of the operating system to be branded as "macOS" instead of "OS X."
- **Siri Integration:** This release marked the debut of Siri on the Mac platform, providing a desktop-optimized version of the virtual assistant.
- **Geographic Naming:** The version is named after the Sierra Nevada mountain range, following the tradition of naming macOS releases after California landmarks.
- **UNIX Compliance:** It is officially certified as a Version 3 of the Single UNIX Specification (UNIX 03).

## Body

### Release History and Versions
macOS Sierra followed a standard release cycle starting in late 2016. The initial stable version (10.12) was published on September 20, 2016. Apple released several subsequent updates to improve stability and security:
*   **10.12.1:** October 24, 2016
*   **10.12.2:** December 13, 2016
*   **10.12.3:** January 23, 2017
*   **10.12.4:** March 27, 2017
*   **10.12.6:** July 9, 2018 (Final preferred version)

### Technical Specifications
The operating system is built upon the **Darwin** core and utilizes the **Aqua** GUI toolkit. It is classified as an operating system for Apple computers and is a part of the broader macOS series. The system is distributed digitally and is identified in the App Store by the ID 1127487414.

### Ecosystem and Compatibility
macOS Sierra is designed to work in conjunction with other Apple technologies, specifically requiring or running alongside **iOS** for various continuity features. It is succeeded by **macOS High Sierra**, which continued the 10.x versioning as 10.13. The software is licensed under the **Apple Public Source License** and is developed and published by **Apple Inc.**, headquartered in Cupertino, California.

## Schema Markup
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## References

1. Quora