I have the same problem with my BCM943602CS. It worked perfectly under 10.11.6. And it worked for one or two days unter 10.12.1. I have no Idea what I did, but since of today, I can't activate my wifi anymore (bluetooth still working). It is recognized in the system specifications: en2: Kartentyp: AirPort Extreme (0x14E4, 0x111) Firmware-Version: Broadcom BCM43xx 1.0 (126.96.36.199.1a8) Can I check if I have a wrong kext in S/L/E? (or anywhere else?) Thanks for your help.