I am using Emacs on mac osx 10.7*. I have the LongLines mode where long sentences are truncated on screen with $ symbol. M-x visual-line-mode does not exist in my Emacs. That is when I type M-x and then visual and TAB it says no such command, nothing with visual. How to set line wrap in this situation?

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    What does M-x emacs-version RET report? – Basil Oct 13 '17 at 10:09
  • According to describe-symbol, visual-line-mode is an interactive compiled Lisp function in ‘simple.el’. In my system (emacs version 25.3 installed through homebrew), you can find simple.el with the following command find /usr/local/Cellar/emacs/25.3/ | grep simple.el – Martín Oct 13 '17 at 15:14
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    Visual line mode has been part of Emacs since 23.1, released in 2009, so you've either got a very old version of Emacs, or something very strange has happened in your config. github.com/emacs-mirror/emacs/blob/… – Tyler Oct 13 '17 at 17:45
  • If you want a current self-contained Emacs version that is pre-built, have a look at: emacsformacosx.com It has nothing extra -- it is just a vanilla build for OSX. – lawlist Oct 13 '17 at 21:25
  • My emacs version is : GNU Emacs 22.1.1 (mac-apple-darwin) of 2012-08-24. I am using osX lion and the emacs is the default one. For Updating it I might have to install newer verison and change links (apple.stackexchange.com/questions/229669/…). Should I update or is there a similar command for line wrap in this old version. Thanks guys ! – user1782328 Oct 14 '17 at 8:22

The problem was the version. I installed emacs version - 25.3 from port. Now it works. emacs-25.3 gets installed in /opt/local/bin and one can rename it so that emacs command from terminal opens it. And emacs in /usr/bin can be renamed to emacs-22 so that it can still be accessed and there is no conflict.

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