- Dec 22, 2017
When installing sierra on my hp 6200 pro desktop I encoutered the kernel cache 0x90 error . Booting with only -f UseKernelCache=No did the trick and I also enabled the nvidia web drivers. After that everything went perfect when I tried to install the OS my disk wasn't showing up. So I used the disk utility and formated as mac Mac OS Extended (Journaled) and the disk showed up. Just sharing in case someone is still struggling.