I followed the guide but after rebuilding the cache I cannot boot anymore, starts loading then I get the Ø symbol. I can boot from Recovery HD. To provide a bit of context I have my hackintosh perfectly working on macos 10.12.4 then I updated the bios and since then when I try to adjust the brightness the computer freezes, so I thought to upgrade to 10.12.6 to have original macos support for my kabylake cpu and maybe fixing the problem, I also removed FAKEPCIID.kext (it shouldn't be useful anymore right?) but I still get freeze if I try to adjust the brightness and no brightness bar appears under settings. I attach the problem reporting zip.