Airdrop is not working with my Mac
For the record, Airdrop only works if you have one of these Macs, and a supported iOS device:

"To send items to an iPhone, iPad, or iPod touch, or to receive items from those devices, you need a 2012 or later Mac model with OS X Yosemite or later, excluding the Mac Pro (Mid 2012)."

iOS


iPhone 5 or later
iPad Pro
iPad (4th generation) or later
iPad mini or later
iPod touch (5th generation) or later


On the iPhone, you need to set Airdrop in Control Center, I recommend 'Everyone' just to be sure. Both wifi and bluetooth need to be on.