P9X79 trouble installing

[pierrotlefou]

Hello pierrot, do you come from the country of 1000 fromages?

Oui exactement
What about you ?

 

[220184]

Same, 75... If you are un the same place, we can maybe try with my USB installer or my test HDD.

 

[melcon]

Hi, i install Yosemite first and then upgrade software, i now have sierra running great, if i tried to install el captain i had the same issues.

 

[220184]

Great for you. It's really strange. How to explain. The most important is that you have the last version working.