

If you use Clover just copy them to EFI/Clover/Kexts/Other.

Make sure your specific Intel card is supported, download the latest release and use the two kexts IntelBluetoothFirmware.kext and IntelBluetoothInjector.kext. It is a macOS kernel extension that that uses firmware binaries from Linux to make Bluetooth work. To get Intel Bluetooth working you need IntelBluetoothFirmware. Later I discovered and open-source project that aims to make Intel Wi-Fi and Bluetooth work on macOS and I was able to make the Intel AC7260 card work, no dongles needed. When I turned by old Thinkpad T440s into a hackintosh I bought a Wi-Fi dongle because the Intel AC7260 Wi-Fi + Bluetooth card is not supported by macOS, no Intel cards are. You can get Wi-Fi + Bluetooth card used by Apple as I did in my desktop, but sometimes you do not have much choice. If you use a hackintosh you have to choose your hardware carefully to make sure it is supported by macOS.
