i have finally installed what you are talking about
i have done it before cos it took too much time lol
but finally it was not a problem : i have OS mac high sierra and they say that the update was for OSX 9 and not above but it worked
i think it's solved now but it was strange for me to read that with this product manager cos'
i thought they wanted us to go to EZ 2 which is not what i want now
yeah it's good thanks 🙂 ) 
now i want a metal pack lolllll