Hi everybody i have a few problem with a mac air 2011. I have tried several time to upgrade Yosemite to El Capitan/Sierra/High Sierra with no luck, everytime i tried the installer crash. I tried to upgrade from os and from usb (I created the bootable usb from windows and from mac os). I attached you the log report of High Sierra. Please could you suggest me a solution this laptop is driving me mad.
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