Disable trackpad when mouse is conncted on Mavericks, How to?

Hello,

I've been searching for a solution on how to disable trackpad once my magic mouse is connected. I remembered I did it on Mountain Lion successfully.
Here you are step-by-step instructions,

How to disable Trackpad on Mavericks in 3 steps:

Step 1: Click on "System Preferences"

Step 2: Click on "Accessibility"

Step 3: Choose "Mouse & Trackpad"
To the right please check the box "Ignore build-in trackpad when mouse or wireless trackpad is present"

Done 🙂

If you have any other methods, please share.

Thank you.