Add a Private Key to Your Mac OS X Keychain
If you are using Mac OS X, you can add a private key to the built-in keychain by typing the following:
Oftentimes your ssh key is named id_rsa and is stored at ~/.ssh. To add this file to your keychain do the following:
Whenever you boot/reboot your Mac, all SSH keys in your keychain will be automatically loaded.
You should be able to see the keys from the command line via:
Hope this helps!