Please help! I installed AHCI_Intel_Generic_SATA.kext in EFI/Oz/Darwin/Common/Extensions and suddenly my system will not start - just a black screen. I can't start in Safe Mode or Single User mode. Can't start from El Cap install USB. I can get to Bios settings or EDK shell, but that's it. My EFI volume was disk4s1 when I mounted it from Terminal in OSX.
Can I delete that kext from the EDK shell? What can I do?
El Cap 10.11.4 Oz 167-Mass F6, GA-Z97xUD7TH, EVGA 960 x2 graphics.
Use your windows to delete it!
Boot into windows, open diskpart and type list disk and select OS X disk, type list partition and select your efi partition, type assign letter D.
Now go to windows task manager select new task and go to refi partition from it and select your kext if it not appear select all files.