This might seem like a strange one, but I almost always have Terminal.app running for one reason or another, especially when developing as I am using Git for version control. It does seem however that after an extended period of development time in XCode with the iPhone SDK (and the many build cycles that come with it) that I'm an unable to start any more terminals (either in a new tab or by restarting Terminal.app completely). Instead I get the error: "Could not open a new pseudo-tty." Googling for this revealed little, except for one relatively old post related to using the iPhone SDK: http://blogs.oreilly.com/iphone/2008/03/fixing-terminal-tty-errors.html It's suggestion is to reboot the machine which in my experience is the only way to solve the problem Does anybody else have this issue? What could be causing it? It's very strange and very frustrating.