The preference to enable auto-update will be disabled in the following scenarios:
- When there is no app installed on your system that supports auto-update.
- When you have uninstalled all apps from your system that support auto-update.
Once you install an app that supports auto-update, the preference to enable auto-update will be enabled.
The option to auto-update an individual app will not be available unless you select Enable Auto-Update from preferences. Once you select the option to enable auto-update from preferences, the option to manage auto-update for individual apps will be available.
Auto-update will be turned off in the following scenarios to prevent older versions of your apps to be removed.