Switch Control and Accessibility Keyboard Guide
Switch Control and the Accessibility Keyboard 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 shortcut
See 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 shortcuts
How 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 FileVault
Use 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 descriptions
Use Screen Curtain with VoiceOver for your Mac, iPhone, iPad, iPod touch, and Apple Watch
If you use VoiceOver on your device, Screen Curtain allows you to turn off the display for added privacy, or if you don't need the display for device operation.
Use Screen Curtain with VoiceOver for your Mac
Make and receive RTT calls on your Mac
Starting with macOS Mojave 10.14.2, you can use the RTT (real-time text) protocol for conversational text calls.
Learn about RTT calls
Change the subtitles or audio language for iTunes Store movies and TV shows
Some video content from the iTunes Store includes alternative audio languages or other accessibility features such as closed captions (CC), subtitles for the deaf and hard of hearing (SDH), and audio-described (AD) content. You can use these features on your iOS device, computer, Apple TV, and in some other apps and services.
Access closed captions and subtitles
Use your voice to enter text on your Mac
The Dictation feature converts your spoken words into text.
Use Dictation
How to use Siri on your Mac
macOS Sierra and later brings Siri to your Mac, with 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 Guide
Apple 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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