air drop is not working after I upgraded my mac book pro retina late 2014 with latest el capitan 10.11.3 and ios 9.2.1 in my iphone 6s. And my bluetooth of iphone is dropping frequently. I tried PRAM,deleted file calledBluetooth.plist but didn't w

air drop is not working after I upgraded my mac book pro retina late 2014 with latest el capitan 10.11.3 and ios 9.2.1 in my iphone 6s. And my bluetooth of iphone is dropping frequently. I tried PRAM,deleted file calledBluetooth.plist but didn't work on my mac. i also reset network settings in my phones, signed out n sign in in apple account... tried everything but still its not working.. when my mac had Yosemeti n iphone had ios 8 it was working perfect. need help.....

now apple is making **** softwares ...worse n worse