Apple Macintosh operating system has in built Mac App Store and it used to auto-update the installed application. While some user like this feature that auto updates and some user don't like this feature because they have slow internet connection ( or ) Low Usage Plans ( or ) Updated changes in the application. Learn how you can avoid auto updates in OS X Mavericks (or) Yosemite Go to System Preference > App Store > The below screen will appear Now uncheck the " Automatically check for updates ". That's it.