Set Accessibility preferences on Mac
If you have difficulties with hearing, vision, or mobility, try out the wide range of Accessibility preferences on your Mac.
To access the preferences, choose Apple menu 
> System Preferences, then click Accessibility.
Open Accessibility preferences for me
General | Select the items to include in the Accessibility Options shortcut panel. | ||||||||||
VoiceOver | Turn on or off VoiceOver, the built-in screen reader that describes aloud what appears on your screen, open VoiceOver Utility, or start the VoiceOver tutorial. | ||||||||||
Zoom | Zoom in to make content on the screen larger and easier to see. You can zoom the entire screen or a portion 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. | ||||||||||
Siri | Type your requests to Siri instead of speaking them. | ||||||||||
Keyboard | Enter modifiers more easily using Sticky Keys, and prevent accidental keystrokes using Slow Keys. Turn on the Accessibility Keyboard as an alternative to a physical keyboard, and use Dwell options to control the pointer with a tracking device. | ||||||||||
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. | ||||||||||
Other System Preferences, such as Displays, Sound, Keyboard, Trackpad, and Mouse, offer additional options that may help you.