sshLogin ssh-agent ssh-add

ssh-agent and ssh-add don't do what you want if run from terminal or xterm.

The excellent application sshLogin carries a GPL licence. This provides ssh-agent ssh-add functionality integrated with Apple's X11. You can even, in effect, install your ssh identity in your Apple keychain.

To install sshLogin:

• Download the Stuffit Archive, sshLogin-1.3.pkg.sitx.
• Save it and unpack using StuffIt Expander.
• Open the resulting package to install sshLogin.

You have to set up a keychain pair using ssh-keygen before using sshLogin.