Remove any Clover fake-id's and/or dsdt patches for WiFi and give this attachment a try.
Only the Bluetooth part works under Windows. The WiFi doesn't work despite installing the appropriate drivers from Boot Camp. The WiFi card has a yellow exclamation point in Device Manager and shows error code 10.14e4:4360 is an existing Broadcom BCM4360 chipset card.
Its probably one of the very first revisions.
The kext is supposed to make AirportBrcm4360 load for 14e4:4360.
Does the card work under Windows? If so it has a good chance of working under OS X also.
Since this patch easily allows any country code:
For US: (Tested in 10.0.1 & 10.10.2)
Find: E8 51 0E 00 00 85 C0 74
Replace: 66 C7 06 55 53 90 90 EB
Country code bytes in bold
For US only it's maybe possible to do a single patch across many OS X versions.
I'll check that when I get home.
The existing patch on the first page overrides the XT or US settings with new settings for that country.
Obviously thats an regulatory breach as-is.
Since this patch does not replicate other region settings under XT, but actually allows the user to set his/her correct country code, it should be the some regulatory compliant.
Maybe prepare some script to generate an users correct country code in the patch?
That way it will be a regulatory compliant patch.