I have a mid-2012 MacBook pro running Yosemite and an iPad Air 2 with the latest iOS 8. The 2 devices can connect via Bluetooth (at least they claim to be connected), however, neither initially showed up in the others AirDrop widget.
Both BT and WiFi are turned on, AirDrop is enabled (set to
Everyone), but the Finder window stayed blank. I rebooted and reconnected the devices which did not help.
Funnily, I can send a file to the iPad via the Share context menu, and after selecting the iPad it suddenly showed up in AirDrop, but the other direction does not work.
How can I diagnose what the problem might be?