Some Apple devices require adapters in order to connect the Blackbaud MobilePay reader for swiping credit cards to accept transactions. When connecting the adapter the user may experience a pop up on the device stating "This accessory is not supported."
This is a response from the Apple device operating system and is related to the adapter in use. Make sure to use an adapter certified by Apple.
If you have verified the adapter is certified by Apple and are still experiencing this issue test the MobilePay reader directly connected to a device without the adapter, and then test again with a different adapter on the device again. If the error persists when using the adapter, please contact Apple support.