Switch Control and Dwell Control Guide
Switch Control and Dwell Control allow you to use adaptive devices (such as a switch or joystick) or eye- or head-tracking technology to interact with items on the screen, and control your Mac.

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About the Accessibility Options shortcut
OS X includes an Accessibility Options shortcut that lets you quickly turn on or off common accessibility features
Learn about the Accessibility Options shortcutSee all accessibility shortcuts
Accessibility shortcuts help you control your Mac with a keyboard or assistive device. You can also ask Siri to help with some accessibility features.
Mac accessibility shortcutsHow to log into your Mac when both FileVault and VoiceOver are enabled
Use these steps to log in if you're using VoiceOver and FileVault at the same time.
See steps for VoiceOver and FileVaultUse audio descriptions to hear narration describing a video clip, show, or movie
OS X Yosemite and later and iOS 8 and later include the ability to play audio descriptions of video files when these tracks are available.
Use audio descriptionsTurn on closed captions and subtitles on your Mac
Most recent macOS versions include a number of apps and features that support closed captions and subtitles, including iTunes, DVD Player, QuickTime Player, and HTML5 video viewed in Safari.
Access closed captions and subtitlesUse your voice to enter text on your Mac
The Dictation feature converts your spoken words into text.
Use DictationUse Siri on your Mac
macOS Sierra brings Siri to your Mac and includes features from Siri on iOS as well as new capabilities designed just for your desktop.
Use SiriSearch for more topics
Resources

Mac Accessibility Features Guide
Accessibility comes standard in a Mac. macOS includes a variety of features to help you work in alternative ways.
See Mac accessibility features
macOS VoiceOver Getting Started Guide
This guide explains how to use VoiceOver, the advanced screen reader built into macOS Sierra, and includes lists of VoiceOver commands.
Open the VoiceOver GuideApple developers can use these resources to help make their applications accessible.
Get the bigger picture on what's happening with accessibility at Apple.
Get Braille displays, Bluetooth remote controls and switches for Mac, iPad, iPhone, and iPod.

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