Snap/Maximize function has stopped working. What could be wrong and how can I fix it?
This is not a feature provided by OSX.

You must have an extension installed  which adds this feature. e.g. BetterSnapTool or BetterTouchTool.

Maybe everything is fine and the applications just crashed. Then I'd try to log out and back in.

Also see this list of window mangement tools to check if you have such an application installed.


check for such an application in /Applications and ~/Applications
check System Preferences &#x2192; Other