Where are the softs ?

Hello

I want to change the general volume with my computer and for that I decided to reinstall the steinberg tools on my macbbok pro because I didn’t see the softs. But now I have reinstalled I still don’t see the softs in my computer.

I have only a soft named yamaha Steinberg USB control panel but There is nothing when I clic on it.

Where are the steinberg tools ? :confused:

My computer : Macbook pro 13
OXS 10.11.4