Disable ⌘+SHIFT+F keyboard shortcut for fullscren I use Spectacle to allow me to hit ⇧ + ⌥ + ⌘ + F to maximize a window.  However, sometimes I miss the ⌥ key, and this results in the system shortcut for moving the window to a new space to happen instead.

Trying to set ⇧ + ⌘ + F as the key combination in Spectacle produces a "this is a system shortcut, please disable it in system preferences" message, but I can't find that shortcut anywhere under keyboard shortcuts in System Preferences.

How can I disable ⇧ + ⌘ + F?

This is OSX Yosemite.
BetterTouchTool. Create a custom shortcut with CMD+SHIFT+F under Golbal, and leave the Assigned Action to blank. BTT will override the built-in action.