# Mac OS X 10.1

> second major release of OS X

**Wikidata**: [Q478451](https://www.wikidata.org/wiki/Q478451)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Mac_OS_X_10.1)  
**Source**: https://4ort.xyz/entity/mac-os-x-10-1

## Summary
Mac OS X 10.1, also known as Mac OS X Puma, was the second major release of the macOS operating system, developed by Apple Inc. Released on September 25, 2001, it was based on the Darwin Unix-like operating system and introduced the Aqua user interface. It was the first version to use the "10.x" versioning scheme, following Mac OS X 10.0.

## Key Facts
- **Release date**: September 25, 2001
- **Developer**: Apple Inc.
- **Based on**: Darwin (Unix-like operating system)
- **Version**: 10.1.5 (latest stable release)
- **GUI framework**: Aqua
- **Platform**: PowerPC
- **License**: Apple Public Source License
- **Predecessor**: Mac OS X 10.0
- **Successor**: Mac OS X 10.2
- **Distribution format**: CD-ROM
- **Part of series**: macOS

## FAQs
### Q: What was the codename for Mac OS X 10.1?
A: The codename for Mac OS X 10.1 was "Puma," which was also used for the subsequent release, Mac OS X 10.2.

### Q: What was the first major release of macOS?
A: Mac OS X 10.0, released on March 24, 2001, was the first major release of macOS.

### Q: What was the latest stable version of Mac OS X 10.1?
A: The latest stable version of Mac OS X 10.1 was 10.1.5, released on June 6, 2002.

### Q: What was the user interface framework used in Mac OS X 10.1?
A: Mac OS X 10.1 introduced the Aqua user interface framework, which became the standard for macOS.

### Q: What was the hardware platform for Mac OS X 10.1?
A: Mac OS X 10.1 was designed for PowerPC-based Mac computers.

## Why It Matters
Mac OS X 10.1 was a significant milestone in the evolution of macOS, marking the transition from the "Classic" Mac OS to a fully Unix-based operating system. It introduced the Aqua interface, which revolutionized the user experience on Apple computers by providing a modern, intuitive, and visually appealing design. The release of Mac OS X 10.1 also marked the beginning of the "10.x" versioning scheme, which is still used today. Additionally, Mac OS X 10.1 was the first version to support the Darwin operating system, which laid the foundation for future macOS releases. Its success paved the way for the continued dominance of macOS in the operating system market.

## Notable For
- **First major release of macOS**: Mac OS X 10.1 was the first major release of the macOS operating system, following the initial release of Mac OS X 10.0.
- **Introduction of Aqua interface**: It introduced the Aqua user interface, which became the standard for macOS and set a new standard for user experience on Apple computers.
- **Unix-based foundation**: Mac OS X 10.1 was based on the Darwin Unix-like operating system, which provided a stable and secure foundation for future macOS releases.
- **PowerPC support**: It was designed for PowerPC-based Mac computers, ensuring compatibility with a wide range of Apple hardware.
- **Apple Public Source License**: Mac OS X 10.1 was released under the Apple Public Source License, allowing developers to contribute to and modify the operating system.

## Body
### Overview
Mac OS X 10.1, also known as Mac OS X Puma, was the second major release of the macOS operating system, developed by Apple Inc. It was released on September 25, 2001, and was based on the Darwin Unix-like operating system. Mac OS X 10.1 introduced the Aqua user interface, which became the standard for macOS and set a new standard for user experience on Apple computers. It was the first version to use the "10.x" versioning scheme, following Mac OS X 10.0.

### Development and Release
Mac OS X 10.1 was developed by Apple Inc. and was based on the Darwin operating system, which provided a stable and secure foundation for the operating system. The codename for Mac OS X 10.1 was "Puma," which was also used for the subsequent release, Mac OS X 10.2. The latest stable version of Mac OS X 10.1 was 10.1.5, released on June 6, 2002. Mac OS X 10.1 was distributed on CD-ROM and was designed for PowerPC-based Mac computers.

### Features and Improvements
Mac OS X 10.1 introduced several new features and improvements, including the Aqua user interface, which provided a modern, intuitive, and visually appealing design. The Aqua interface also introduced new visual effects, such as transparency and drop shadows, which enhanced the user experience. Additionally, Mac OS X 10.1 introduced support for the Darwin operating system, which provided a stable and secure foundation for the operating system.

### Impact and Legacy
Mac OS X 10.1 had a significant impact on the operating system market, paving the way for the continued dominance of macOS. Its success laid the foundation for future macOS releases, which continued to build on the Aqua interface and the Unix-based foundation introduced in Mac OS X 10.1. The release of Mac OS X 10.1 also marked the beginning of the "10.x" versioning scheme, which is still used today. Additionally, Mac OS X 10.1 was released under the Apple Public Source License, allowing developers to contribute to and modify the operating system.

## Schema Markup
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  "datePublished": "2001-09-25",
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## References

1. Freebase Data Dumps. 2013