On the classic Mac OS (the original Apple Macintosh operating system), extensions were small pieces of code that extended the system's functionality. They...

punctuation marks. Mac OS Roman is an extension of the original Macintosh character set, which encoded 217 characters. Full support for Mac OS Roman first appeared...

The history of macOS, Apple's current Mac operating system formerly named Mac OS X until 2011 and then OS X until 2016, began with the company's project...

macOS Sonoma (version 14) is the twentieth major release of macOS, Apple's operating system for Mac computers. The successor to macOS Ventura, it was...

Mac OS X Tiger (version 10.4) is the 5th major release of macOS, Apple's desktop and server operating system for Mac computers. Tiger was released to the...

macOS Catalina (version 10.15) is the sixteenth major release of macOS, Apple Inc.'s desktop operating system for Macintosh computers. It is the successor...

macOS Sierra (version 10.12) is the thirteenth major release of macOS (formerly known as OS X and Mac OS X), Apple Inc.'s desktop and server operating...

Mac OS X 10.1 (code named Puma) is the second major release of macOS, Apple's desktop and server operating system. It superseded Mac OS X 10.0 and preceded...

is the core Unix-like operating system of macOS, iOS, watchOS, tvOS, iPadOS, audioOS, visionOS, and bridgeOS. It previously existed as an independent open-source...

System 7 (later named Mac OS 7) is the seventh major release of the classic Mac OS operating system for Macintosh computers, made by Apple Computer. It...

macOS Ventura (version 13) is the nineteenth major release of macOS, Apple's operating system for Macintosh computers. The successor to macOS Monterey...

Apple Inc. for macOS that come bundled by default or are installed through a system update. Many of the default programs found on macOS have counterparts...

Mac OS (originally System Software; retronym: Classic Mac OS) is the series of operating systems developed for the Macintosh family of personal computers...

Mac OS X 10.0 (code named Cheetah) is the first major release of macOS, Apple's desktop and server operating system. It was released on March 24, 2001...

macOS, previously OS X and originally Mac OS X, is a Unix-based operating system developed and marketed by Apple since 2001. It is the current operating...

macOS Mojave (/moʊˈhɑːvi, mə-/ mo-HAH-vee; version 10.14) is the fifteenth major release of macOS, Apple Inc.'s desktop operating system for Macintosh...

Mac OS 9 is the ninth and final major release of the classic Mac OS operating system for Macintosh computers, made by Apple Computer. Introduced on October...

OS X El Capitan (/ɛl ˌkæpɪˈtɑːn/ el KAP-i-TAHN) (version 10.11) is the twelfth major release of macOS (named OS X at the time of El Capitan's release)...

Mac OS X Snow Leopard (version 10.6) (also referred to as OS X Snow Leopard) is the seventh major release of macOS, Apple's desktop and server operating...

macOS Monterey (version 12) is the eighteenth major release of macOS, Apple's desktop operating system for Macintosh computers. The successor to macOS...

Mac OS X Jaguar (version 10.2) is the third major release of macOS, Apple's desktop and server operating system. It superseded Mac OS X 10.1 and preceded...

OS X Mavericks (version 10.9) is the 10th major release of macOS, Apple Inc.'s desktop and server operating system for Macintosh computers. OS X Mavericks...

macOS High Sierra (version 10.13) is the fourteenth major release of macOS, Apple Inc.'s desktop operating system for Macintosh computers. macOS High Sierra...

OS X Lion, also known as Mac OS X Lion, (version 10.7) is the eighth major release of macOS, Apple's desktop and server operating system for Mac computers...

Mac OS X Panther (version 10.3) is the fourth major release of macOS, Apple's desktop and server operating system. It followed Mac OS X Jaguar and preceded...

Mac OS X Leopard (version 10.5) is the sixth major release of macOS, Apple's desktop and server operating system for Macintosh computers. Leopard was...

OS X Yosemite (/joʊˈsɛmɪti/ yoh-SEM-it-ee; version 10.10) is the eleventh major release of macOS, Apple Inc.'s desktop and server operating system for...

Mac OS 8 is the eighth major release of the classic Mac OS operating system for Macintosh computers, released by Apple Computer on July 26, 1997. It includes...

and colored labels. Mac OS X 10.1 reintroduced CD and DVD burning support from Mac OS 9.1, as well the ability to hide file extensions on a per-file basis...

macOS Big Sur (version 11) is the seventeenth major release of macOS, Apple's operating system for Macintosh computers. It was announced at Apple's Worldwide...