Alex you need to replace the original wifi/bt card with
this one. Ci mette tipo un mese ad arrivare in Italia, ma poi è fatta.
Please note that it's not OOB, you need to install 4 kext:
- FakePCIID_Broadcom_WiFi.kext (to be dropped in EFI\CLOVER\kexts\10.13 or EFI\CLOVER\kexts\Other)
- FakePCIID.kext (to be dropped in EFI\CLOVER\kexts\10.13 or EFI\CLOVER\kexts\Other)
- BrcmFirmwareRepo.kext (in S\L\E via KextBeast)
- BrcmPatchRAM2.kext (in S\L\E via KextBeast)
Courtesy of Rehabman
here and
here
Pay attention to your USB mapping: the bluetooth connection in under the XHC table, then you must find it in IOReg and make sure it's enabled. Here's my IOReg, just to be clear, look for "usb", under HS13 you can see the Broadcom bluetooth controller
The kexts will survive to further updates, don't worry about new High Sierra Releases.
Down here the files