Hi MacRumors! Since I have upgraded to Yosemite I have to manually start the ssh-agent on every new terminal/bash window/tab. I know I could manually start the agent in bash_profile but trying to work out what may be causing the problem...? Steps: Load terminal ssh-add -list - Could not open a connection to your authentication agent. ssh-add ~/.ssh/myPrivateKey - Could not open a connection to your authentication agent. ssh-agent -s ssh-add ~/.ssh/myPrivateKey ssd-add -list - success Load a new tab - rince and repeat... Mac Book Pro Mid 2010 Yosemite 10.10 Bash 4.3.30 Thanks!