Adding public key of iOS Prompt app to authorized_keys How do I get the public key for Panic's Prompt app to setup auto-login to my Mac?

I have disabled the option to login with a password over ssh as that would be a security risk.

I have tried copying both the public and private key from my Mac to Prompt's Documents in iTunes, however it failed to connect.

If there is no easy way to retrieve the public key in Prompt, can I log all ssh connections to my Mac and get the public key from that log?
For starters, just to clarify the terminology, when you create a key pair, the private key (typically named id_rsa) goes on the client (in this case the Prompt app), and the public key (typically id_rsa.pub) goes in the ~/.ssh/authorized_keys file on the server you're logging in to (in this case your Mac).

You should be able to just drag the private key into Prompt via the iTunes documents interface. If you're getting a connection error, try doing it with your device attached via USB, not Wi-Fi (I've found Wi-Fi syncing can be a bit flaky at times). If that still doesn't work, open up your private key in a text editor, copy the text and send it to yourself in an email (or any other means that gets the text to your device). You can then copy that text, and when you click the key button in Prompt, it should give you the option to Import Clipboard Key.