macOS Sierra: Set accessibility options for your Mac
If you have difficulties with hearing, vision, or mobility, you can set options in Accessibility preferences to make your Mac easier to use.
To access the options, choose Apple menu > System Preferences, then click Accessibility.
General: Select the items to include in the Accessibility Options shortcut panel (displayed when you press Option-Command-F5 or, if your Mac has a Touch Bar, when you quickly press Touch ID three times). If you select only one option, the shortcut panel isn’t displayed; instead, the option is immediately turned on or off.
VoiceOver: Hear descriptions of what’s on the computer screen, and use commands, gestures, or a braille device to control your Mac.
Zoom: Magnify items on the screen by zooming the entire screen or an area of the screen.
Display: Modify the screen display by inverting colors, removing color, using shapes instead of colors to convey status and information, changing the contrast, reducing the transparent effect on some backgrounds in macOS, and making the cursor easier to spot. You can also reduce the motion of some items on the screen.
Speech: Customize the system voice, hear when alerts or apps need your attention, and have selected text spoken when you press a designated key.
Descriptions: Hear a description of the visual content in movies, TV programs, and other media, if descriptions are available.
Captions: Control how subtitles are styled, and whether to use closed captions and SDH instead, when they’re available.
Audio: Have the screen flash when alerts occur, and play stereo audio as mono.
Dictation: Choose and create dictation commands to use with Enhanced Dictation, to make it easier to control your Mac and use apps.
Keyboard: Enter modifiers more easily using Sticky Keys, and prevent accidental keystrokes using Slow Keys.
Mouse & Trackpad: Control the pointer with the numeric keypad using Mouse Keys, or ignore the trackpad, and set trackpad and mouse options.
Switch Control: Turn on Switch Control and use one or more adaptive accessories to enter text and control your Mac. Use the Panel Editor to create custom panels that make it easier to use favorite apps and games.
Dwell Control: Turn on Dwell Control and use a tracking device to control the mouse. Use the Panel Editor to create custom panels that make it easier to use favorite apps and games.
Other System Preferences, such as Displays, Sound, Keyboard, Trackpad, and Mouse, offer additional options that may help you.