On the Mac keyboard, there is no Delete key, only the backspace.
However, the Delete function can be achieved with the key combination fn+Backspace.
I love my Mac and you will love yours! (by Emilio Imparato)
The Option key on the Mac is also known as the Alt key.

Pour obtenir les caractères [ et ] sur le clavier du Mac, on utilise les touches Alt et Shift en combinaison avec ( et ) respectivement.