Thanks HCP for the response,

In my memories it was MultiBit but it was in 2014 and i just save one folder in my mac with wallet.dat , peers.dat , etc...
I do the recover of the wallet.dat with Bitcoin Core (put the wallet.dat in folder and rescan) and no problem but i wait for download of chain so i did'nt have more info about number of bitcoin in wallet.
At the same time, in console of bitcoin core i use the command to find private key,  but there no info about THE ADRESS who interrest me...

Somebody have an idea ?