I am trying to create a utility that doesn\'t open a window when executed, and that would be activated from a hot key; I read that currently Cocoa doesn\'t have a function for t
Take a look at Shortcut Recorder (http://wafflesoftware.net/shortcut/) a framework that uses the Carbon Event Manager for Global Hotkeys it also allows you to change the user to change the HotKey (if this is what you want).
And see this Project/Code on how to implement it : http://github.com/sdegutis/SDGlobalShortcuts.