If you want to disable the Auto-Save feature of OS X, it is now just a matter of checking a settings box in System Preferences.
- Open “System Preferences” from the Apple menu and click the “General” pane
- Check the box next to “Ask to keep changes when closing documents”
- Close out of System Preferences
Automatic saving is now turned off, you will be asked to save files manually each time you attempt to close a file or document that has been modified.