Mac OS X Leopard

Mac OS X Leopard. It is the sixth major release of Apple Inc.'s desktop and server operating system, succeeding Mac OS X Tiger and preceding Mac OS X Snow Leopard. Unveiled at the WWDC 2006 keynote by then-CEO Steve Jobs, it introduced over 300 new features and was marketed as a significant architectural update. The release solidified the platform's transition to Intel processors and emphasized integration with other Apple services and hardware.

Development and release

Development began shortly after the release of Mac OS X Tiger, with an initial preview shown at WWDC 2005. The project, codenamed "Merlot," was officially announced by Steve Jobs at WWDC 2006, with a planned release in spring 2007. Delays, attributed to the need to divert resources to complete the inaugural iPhone OS for the iPhone (1st generation), pushed the launch to October. The final version was released on October 26, 2007, and was the first Mac OS X version to be offered with a single license for both desktop and server use. Its development coincided with major projects like the transition to Intel chips and the launch of the iPhone, marking a period of intense innovation at Apple Inc..

Features

Leopard introduced a substantially revised user interface, including a redesigned 3D Dock and a unified "Brushed Metal" theme. A major new component was Time Machine, an automated backup utility that worked with local drives or networked storage. The Finder was updated with Cover Flow browsing and Quick Look for instant file previews. Enhancements to Spotlight allowed searching across networked Macs, while Boot Camp was integrated to natively support installing Microsoft Windows. Other significant additions included Spaces for virtual desktops, Screen Sharing in iChat, and the introduction of WebKit-based Mail notes and to-dos.

System requirements

Leopard required a PowerPC G4, G5, or Intel-based Mac with a minimum of 512 MB of RAM and 9 GB of available disk space. A built-in DVD-ROM drive was necessary for installation from physical media. For certain features like Photo Booth and Front Row, an Apple Remote and an iSight camera were required. The operating system dropped support for the Classic Environment entirely, ending the ability to run older Mac OS 9 applications, and was the last version to support the PowerPC architecture.

Reception

Upon release, Leopard received generally positive reviews from publications like Macworld and Ars Technica, which praised its polish, breadth of new features, and the utility of Time Machine. Critics noted its stability and the significant visual overhaul of the interface. Some initial compatibility issues with third-party software and peripherals were reported, but these were largely addressed in subsequent updates. The release was a commercial success, with Apple Inc. reporting over two million copies sold in the first weekend, making it one of the company's most successful OS launches at the time.

Version history

Following the initial 10.5.0 release, Apple Inc. issued several incremental updates to address bugs, improve stability, and enhance security. Version 10.5.1 arrived in November 2007, primarily fixing issues with Mail and Time Machine. Major updates included 10.5.2, which introduced official support for the MacBook Air, and 10.5.4, which added MobileMe synchronization. The final update, 10.5.8, released in August 2009, provided crucial security patches, improved compatibility with newer hardware like the Unibody MacBook Pro, and prepared the system for the transition to Mac OS X Snow Leopard. This version marked the end of the line for the PowerPC platform.

Category:MacOS