If you look closely it appears to be a fullscreen iTerm2 running a fancy tmux powerline.<p>Edit: From <a href="https:&#x2F;&#x2F;github.com&#x2F;koekeishiya&#x2F;kwm&#x2F;issues&#x2F;8#issuecomment-166593294" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;koekeishiya&#x2F;kwm&#x2F;issues&#x2F;8#issuecomment-166...</a><p>&quot;The Apple menubar is hidden using the option that was added with El Capitan. I&#x27;m using the program nerdTool to create the illusion of a bar that you see in the screenshot.&quot;