Losing track of the mouse cursor is something that can happen to anyone, especially when using multiple virtual desktops or working on a multi-monitor setup. Mac OS X El Capitan introduces a new gesture to help you locate the position of the mouse cursor on the screen.
How To Locate Your Mouse Cursor
You simply have to wiggle your finger on the trackpad or shake your mouse to animate (enlarge) the mouse cursor.
How to Disable the Shake to Locate Gesture
If you think that Shake to locate is nothing more than a gimmick, here's how to turn it off. Click on the Apple menu and then head to System Preferences > Accessibility > Display. Clear the Shake mouse pointer to locate checkbox.