MacOS

macOS (previously OS X and originally Mac OS X) is a proprietary Unix operating system, derived from OPENSTEP for Mach and FreeBSD, which has been marketed and developed by Apple since 2001. It is the current operating system for Apple's line of Mac computers. Within the market of desktop and laptop computers, it is currently the second most widely used desktop OS, after Microsoft Windows and ahead of all Linux distributions, including ChromeOS and SteamOS. , the most recent release of macOS is macOS 26 Tahoe, the 22nd major version of macOS.

Archicad is an architectural building information modeling (BIM) computer-aided design (CAD) software for Mac and Windows developed by the Hungarian company Graphisoft.

digital app distribution platform for macOS

core Unix-like operating system of macOS, iOS, etc.

AirDrop is a file-sharing service in Apple's iOS, macOS, iPadOS and visionOS operating systems that operates over a wireless ad hoc network. AirDrop was introduced in Mac OS X Lion (10.7) and iOS 7, and can transfer files among supported Apple devices by means of close-range wireless communication. There is no limit on the size of files that can be transferred. This communication takes place over Apple Wireless Direct Link (AWDL) "Action Frames" and "Data Frames" using generated link-local IPv6 addresses instead of the Wi-Fi chip's fixed MAC address. In November 2025, Quick Share added limited

XNU ("X is Not Unix") is the computer operating system (OS) kernel developed at Apple Inc. since December 1996 for use in the Mac OS X (now macOS) operating system and released as free and open-source software as part of the Darwin OS, which, in addition to being the basis for macOS, is also the basis for iOS, iPadOS, watchOS, visionOS, and tvOS.

thumb|A Hackintosh running OS X Yosemite

email client included by Apple for macOS, iOS, iPadOS and watchOS

assembler and disassembler for the Intel x86 architecture

iChat (previously iChat AV) is a discontinued instant messaging software application developed by Apple for use on its Mac OS X operating system. It supported instant text messaging over XMPP/Jingle or OSCAR (AIM) protocol, audio and video calling, and screen-sharing capabilities. It also allowed for local network discussion with users discovered through Bonjour protocols.

Applications provided for macOS

computer networking technology

basic calculator application made by Apple

OS

VoiceOver is a screen reader built into Apple Inc.'s macOS, iOS, tvOS, watchOS, and iPod operating systems. By using VoiceOver, the user can access their Macintosh or iOS device based on spoken descriptions and, in the case of the Mac, the keyboard. The feature is designed to increase accessibility for blind and low-vision users, as well as for users with dyslexia.

file system developed by Apple

file system developed by Apple

firewall program for BSD systems

personal computer automation software

operating system developed by Apple

operating system

image viewer software by Apple

Apple, Inc. software for Mac OS X and macOS

disk image file format developed by Apple and commonly used by macOS

procedure to turn off the computer

FileVault is a disk encryption program in Mac OS X 10.3 Panther (2003) and later. It performs on-the-fly encryption with volumes on Mac computers.

technical standard

string used to identify file types on Apple subsystems

Macintosh fat binary

feature in iOS, iPadOS and macOS

graphics layer

instant messaging software application developed by Apple

OS X file preview service

software for Apple macOS

file manager/explorer designed by ES Global

concurrency system created by Apple Inc.

service created by Apple Inc.

In computer networking, xinetd (Extended Internet Service Daemon) is an open-source super-server daemon which runs on many Unix-like systems, and manages Internet-based connectivity.

macOS application

file format

proprietary format hidden file

boot loader developed by Apple Inc.

iOS scripting application

macOS application

launchd is an init and operating system service management daemon created by Apple Inc. as part of macOS, iOS, iPadOS, watchOS, tvOS, and visionOS to replace its BSD-style init and SystemStarter. There have been efforts to port launchd to FreeBSD and derived systems.

monospaced typeface

task manager in the macOS operating system

LDAP-compatible directory service for Mac OS X Server

directory bundle containing an application's executable and its resources

the iOS (iPhone) software feature introduced with iOS 9.3

computer disk partitioning scheme

Macintosh models that do not use a Macintosh Toolbox ROM on the logic board