Recently Apple released OS X Mavericks to the public for FREE. What a great deal, right? Anyways, to the reason we are here. You just downloaded the new update and immediately launched your favorite app and it requires you to “enable access for assistive devices“. So you think no problem, right? You head over to System Preferences and navigate to the Accessibility Pane only to find that this option is no longer there. Whoops!
Lucky for us, it is as simple as navigating to System Preferences > Security & Privacy > Accessibility and then proceeding to enable your favorite app.
In this case the application that needed it was Flexiglass. The app that made Mac possible for me. It mimics many of the window management features that Windows provides. Such as, but not limited to, a real maximize button, a real close button and much more! If you have never used it I highly suggesting at least trying it out. There is a 15 day free trail on their website. Cheers!
Tl;dr: Navigate to System Preferences > Security & Privacy > Accessibility and then check the app you want to give access to.