Turn on Wi-Fi and Bluetooth on both devices
Make sure both devices are close to each other
On iPhone or iPad, open Photos
Select the photo or photos you want to send
Tap the Share button
Tap AirDrop
Choose the nearby device
On the receiving device, tap Accept
Wait for the transfer to finish
On Mac, open Finder and select AirDrop if needed
Drag the photo to the AirDrop window or share it from Photos
Choose the receiving device
On the receiving device, tap Accept