If you’re in the latter group, here’s how to disable automatic app updates in OS X Mavericks.
Open System Preferences and click on the “App Store” preference pane.
Uncheck the box next to “automatically check for updates,” which will also automatically uncheck the other three subset of options.
Now, your App Store apps will no longer be automatically updated. However, you can always re-enable them if you change your mind, by following the same steps.
