Text-to-Speech
Click the Apple icon (upper left corner)/System Preferences.
Click Accessibility.
Choose Spoken Content on the left menu.
Select the checkbox, Speak selection.
Adjust Voice and Speaking Rate.
Close Settings.
The controller allows you to speed up/slow down speech, jump to the next/previous sentence, pause speech and stop speech.
Click x to close the controller.
Using the cursor, highlight text you want read.
Press Option+Esc to start text-to-speech.
Press Option+Esc to stop reading or the stop icon on the Controller.
How to set up Speak Selection on Mac