Ok I changed that thanks. I will upload my config plist later, I have some homework right now, and I dont have supported wifi card for Sierra yet, so I have use a virtual machine to do everything which is rather complicating. For the moment, what should I set the DVMT pre allocated for Sierra for intel HD 520. i have looked everywhere, but can not find anything about it. My computer sets it currently to 128 mb (found it by looking at the HD 520 properties in windows) If I have to change it, I am ready to install Linux and do it from there, as my bios does not support the option to change it.