Some of the common causes of AirDrop stuck on waiting are:
- Both devices are not close enough to each other to let AirDrop connect them.
- Your iPhone or Mac is not fulfilling the AirDrop minimum requirements.
- Wi-Fi and/or Bluetooth is turned off on any device or a personal hotspot is enabled.
- Glitches in system software or any app running in the background.
- Outdated iOS version.