Keyboard shortcut for buttons in dialogue box Given the following options at the bottom of a dialogue box:



If I press Enter (return) key, it will select Cancel, the default selected button. What's the keyboard shortcut to select Delete option instead?
Almost, though not quite, universal on macOS is the use of  Cmd ⌘   Backspace ⌫  [or Delete on keyboards without a distinct Backspace key] to discard, or discard changes.

This should also work to invoke "Don't Save" in dialogs too.
Some apps still accept the alternative of  Cmd ⌘   D  to do this, but Backspace has been the recommended method for several years [since Lion or so].