Thank you UltraLaser,
I have applied your suggestions and system is working, included wifi and bt, but now my wifi device is recognised into the system information as a third party wireless device while into the IORegistry is again a Brcm4331 (see the attached images, sorry for the Italian language!!).
Obviously handoff/hotspot is not working.
Do you have any other idea?
IORegistry.jpeg 182.9KB 2 downloads