Why is AirDrop not working?
Check there are no software firewalls on your Mac blocking all incoming connection requests
QAirDrop won’t work on my MacBook Pro (Mid 2012) running OS X 10.11.6. The option to share using AirDrop appears, but when I try to use it, Finder or the app I’m using becomes unresponsive. What’s wrong with my Mac?
AAirDrop is an ad hoc service that depends on a device’s Bluetooth and Wi-Fi hardware. It normally either works fine, or it doesn’t work at all, no matter how hard you try to fix it. Macs from 2012 or later, excluding 2012’s Mac Pro, can share with most other Macs from 2008 or 2009 onwards, as well as devices running iOS 7 or higher.
Both devices need to have Wi-Fi and Bluetooth turned on, and receiving Macs must not have any form of software firewall set to block all incoming connections – that applies to the built-in firewall in System Preferences’ Security pane as well as third-party products, such as Little Snitch or NetBarrier.
AirDrop works best with OS X 10.10 and higher, but provided you open an AirDrop window, it can also work with OS X 10.7 up to 10.9. However, it can be even less reliable in those older versions. Apple provides further information at apple.co/2eaIQf9.
Ensure that both Bluetooth and AirPort are turned on and aren't blocked by a firewall, then AirDrop should just work.