Apple Remote Desktop

Apple Remote Desktop (or ARD) is a program developed by Apple to allow system administrators to remotely access and manage Macs.

Features
Features include the ability to shutdown and restart machines, install software and file, run commands, control computers, and lock out users (with a curtain). Administrators can build command sets in Automator to run specific tasks in a predictable manner.

Version history

 * Version 1.0 was released in 2002 for Mac OS X 10.1 and required clients to be running Mac OS 8.1 or later.
 * Version 2.0, released in July 2004, required Mac OS X 10.2.8 or later on all systems.
 * Version 2.2, released on April 29, 2005, added support for Mac OS X 10.4 (Tiger).
 * Version 3.0, released on April 11, 2006, was the first Universal binary with support for Intel processors.
 * Version 3.2, released on October 17, 2007, added support for Mac OS X 10.5 (Leopard).
 * Version 3.4, released on December 23, 2010, was the first release through the Mac App Store.
 * Version 3.5, released on July 20, 2011, added support for Mac OS X 10.7 (Lion).
 * Version 3.5.2, released on June 11, 2012, added support for Macs with Retina displays.
 * Version 3.7, released on October 22, 2013, added support for OS X 10.9 (Mavericks).
 * Version 3.8, released on January 27, 2015, added support for OS X 10.10 (Yosemite) and OS X 10.11 (El Capitan).
 * Version 3.9, released on February 21, 2017, added a compatibility mode to communicate with users of ARD on an operating system as old as Mac OS X 10.8 (Mountain Lion).
 * Version 3.9.3, released on October 7, 2019, added support for Dark Mode, introduced in macOS Mojave (10.14).
 * Version 3.9.4, released on November 17, 2020, added support for macOS Big Sur (10.15) and Apple Silicon. However, recent versions have been criticized for deteriorating reliability and usability.