OSX contribution layer

contrib/osx/README.md

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+# OSX contribution layer for Spacemacs
+
+## Description
+
+Spacemacs is not just emacs+vim. It can have OSX keybindings too! 
+This layer globally defines common OSX keybindings. ⌘ is set to
+`super` and ⌥ is set to `meta`. Aside from that, there's nothing
+much, really.
+
+## Philosophy
+
+While this layer enables common OSX bindings, it does not implement
+OSX navigation keybindings. Spacemacs is meant to be used with evil,
+and we encourage you to do so :)
+
+## Install
+
+To use this configuration layer, add it to your `~/.spacemacs`
+
+```
+(setq-default dotspacemacs-configuration-layers '(osx)
+  "List of contribution to load."
+)
+```
+
+## Key Bindings
+
+- ⌘ q: Quit
+- ⌘ v: Paste
+- ⌘ c: Copy
+- ⌘ x: Cut
+- ⌘ w: Close window
+- ⌘ z: Undo
+- ⌘ Z: Redo
+- ⌃ ⌘ f: Toggle fullscreen
+
+## Future Work
+
+- Allow user to choose from either `hyper` or `super` as ⌘. This is an option that is supported cross-platform.
+- Configurable option to keep the OSX and spacemacs clipboards separate

contrib/osx/keybindings.el

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+(when (equal system-type 'darwin)
+  ;; Treat option as meta and command as super
+  (setq mac-option-key-is-meta t)
+  (setq mac-command-key-is-meta nil)
+  (setq mac-command-modifier 'super)
+  (setq mac-option-modifier 'meta)
+
+  ;; Keybindings
+  (global-set-key (kbd "s-q") 'save-buffers-kill-terminal)
+  (global-set-key (kbd "s-v") 'yank)
+  (global-set-key (kbd "s-c") 'kill-ring-save)
+  (global-set-key (kbd "s-x") 'kill-region)
+  (global-set-key (kbd "s-w") 'kill-this-buffer)
+  (global-set-key (kbd "s-z") 'undo-tree-undo)
+  (global-set-key (kbd "s-s") 'save-buffer)
+  (global-set-key (kbd "s-Z") 'undo-tree-redo)
+  (global-set-key (kbd "C-s-f") 'toggle-frame-fullscreen))