Hi all, on macOS option-shift-left / right extend the selection by one word. Emacs by default binds meta-shift-left / right in a way that is compatible with the system shortcuts. But org-mode interferes with these bindings even when org-support-shift-select is t. OTOH, an effort has been done to support shift selection in org-shiftcontrolleft / right. The problem is that macOS uses option instead of control to achieve selection by word.
Best regards, Carlos