You know how the iPhone and iPad plays a little chime when you plug it in? The new MacBook also does that. But sadly, the MacBook Air and MacBook Pro remain completely silent when they connect to juice — which can make it hard to tell when you’ve accidentally knocked the MagSafe loose.
If you’ve got a MacBook Pro or MacBook Air, though, it’s easy to hack in the new MacBook’s power-charging sound. Here’s how.