Does not work in Europe with Macbook Air

I bought this lovely adapter expecting it to allow me to use all my iAppliances - iPad, iPhone and MacBook Air. I arrived in France to find that the Aussie adapter only has two prongs, not three as required by the computer. So I had to buy another adaptor what allowed me to use it with the MacBook 3 prong plug. These adapters are large and the new one (same brand) is even larger so I had to allow a lot of room in my briefcase for them both during my three week trip. I will never use the black one again and it was a total waste of money.