Try installing this:
(setq select-enable-clipboard t)
thus, normal kill / yank commands (e.g. Cw and Cy) will work with the clipboard. It works on both X11 and OSX (and, in my opinion, Windows as well).
If you refer to the documentation for this variable (for example, via Ch v), you should make the following sentence:
You can customize this variable.
where "configure" is a link that you can click. This will lead you to the Emacs configuration system, which provides a simpler and more manageable way to configure Emacs. In particular, it will show you a lot about the controls that may be related to customization. Even you do not want to control your configuration in this way, you can use it as a guide to important variables for installation and to what they can be set.
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