Hey Lenox98, I created you an EFI folder without the driver for the network card and added a KEXT, so that now also the SD card reader works.
PS:
Yes alfa is really cool, I drive a Spider 939 and a 159 TI SW 2.4 JTDM. i love the cars, once you drive alfa then you drive alfa forever.
Thanks but nothing to do, auto reboot, maybe I've to try with a fresh installation