On Windows you can use the TAB key to switch between which button has focus then press space to click the focused button.
However, on MacOS, when presented with the dialog in this screenshot, I cannot seem to use tab to switch between the buttons I want to click. I can only hit RETURN to click the Save button, or ESC to click Cancel. But I have no idea how I can click the "Don't Save" button using just the keyboard.
How can I navigate/click buttons in a MacOS message box using just the keyboard (not the TouchBar, Mouse or TrackPad)?
Best Answer
Actually, you can achieve the same behaviour in macOS!
First, you need to do as follows:
Once you've done this, you can use the Tab key to navigate the various options (incl. buttons) in Dialog boxes. In the screenshot below I've selected the Don't Save button.
Once selected, just press the space bar as you would in Windows!