Put these commands in terminal..
sudo perl -pi -e 's|\x58\x54\x00\x2B\x18\x2C\x21\x00\x20|\x58\x54\x08\x0A\x36\x1C\x47\x00\x0A|g' /System/Library/Extensions/IO80211Family.kext/Contents/PlugIns/AirPortBrcm4360.kext/Contents/MacOS/AirPortBrcm4360
sudo touch /System/Library/Extensions/