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Yesterday, I upgraded my Mac to OS X Mavericks, and since then I couldn't open the terminal, each time I open a session, the following error is shown:

[Could not create a new process and open a pseudo-tty.]
[Command not found: tmux]

I don't know what's causing this issue, anyway, a fresh restart and killing the relevant processes on activity monitor doesn't help. Any thoughts?

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The upgrade reset you /bin and /usr/bin etc., if you installed software there, it's now gone. –  Daniel Beck Oct 27 '13 at 14:24
    
Hi Daniel, so what should be done? Thanx. –  Malloc Oct 27 '13 at 16:56
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Don't automatically run tmux when opening the Terminal, instead, run a shell like bash. –  Daniel Beck Oct 27 '13 at 17:56

1 Answer 1

It might be a simple and going into Preferences/Startup/Shells open with and select 'Default login shell'.

It is related to where the Shell you are opening, and you can have multiply shells (but that is another thread'

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