Also, while caps lock + shift is still uppercased, caps lock has no effect on the non-alpha keys. Indeed on a Mac, caps-lock is not shift-lock, it's literally caps-lock: on my French layout, caps-lock'd & gives &, not 1. Since keys with diacritics and other marks like é è à ç adn ù are first-class keys on a french layout, they themselves are capitalized by caps-lock, and not giving in to the shift behavior (which would yield 2 7 0 9 and %). This allows to type É È À Ç and Ù without composition.
If you want the caps-lock-gives-numerics behavior you need to set your layout to "French — numerical" — its icon is a french flag with 123 at the bottom — instead of simply "French".
If you want the caps-lock-gives-numerics behavior you need to set your layout to "French — numerical" — its icon is a french flag with 123 at the bottom — instead of simply "French".