MacBook Pro (Retina, 13-inch, Late 2013) - my mac gives a electric shock when it is plugged in

Most probably a faulty wall socket or faulty extension sockets. The earthing must've been loosen there or burnt out. Check with another wall socket. IO had such tingling feeling in my MacBook, with the 2-prong EU plug. Finally, I bought the Apple extension cable, all tingling stopped..

Yes, we have 2 prongs, and a hole or spring (or both) to accomodate the protective earthing. In certain countries, the L is on the left. Mine in CEE 7/5.

You might be having one of these in Italy,

The earthing spring shown with the arrow would connect the earthing spring of the Apple extension cord plug. When the protective earthing connection is there, you won't get the tingling feeling.

The Apple extension cable for EU has 3-prongs. The earthing connection of the Apple charger is the round metal button.

The earthing button connects to the middle prong of the plug. The Apple extension cable does that. The tingling will go away.

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