How do I enable text-to-speech on my Mac?

On your MacBook Pro, go to  Apple menu  >> System Settings >> Accessibility >> Read & Speak.

Turn on Speak Selection. 

Then select some text and press Option (⌥) + Esc. Your Mac should read the selected text aloud. Press Option–Esc again to stop.

If nothing happens, return to Accessibility >> Read & Speak >> Speak Selection and click the information button beside it. 

Check the keyboard shortcut and make sure a System Voice is selected. You can also use the Play button there to test the voice.

If you still cannot hear anything, check System Settings >> Sound >> Output and make sure your Mac's audio output and volume are set appropriately.

Apple's official Speak Selection instructions

See accessibility settings...

ref: Have your Mac speak text that's on the screen

ref: Change Read & Speak settings for accessibility on Mac

ref: Have your Mac speak text that's on the screen

Terminal.app would be different, an example copy and paste:

say hello