Broadcom Bcm94312hmg Driver [updated] -

If you have no internet connection on the target machine, you will need to use a USB tether from a phone or an Ethernet cable.

Not natively supported beyond macOS 10.11 (El Capitan). Hackintosh users may force-load IO80211Family kexts from 10.11, but AirDrop/Handoff will not work. No official drivers for 10.12+. broadcom bcm94312hmg driver