I don't see any options for deactivating automatic downloads for OS X and individual apps in the App Store app.
2 Answers
You can't disable automatic updates for individual apps.
The only options are to have automatic updates, or to not have automatic updates. It is not possible for granular control currently. You can provide feedback to Apple here:
System Preferences → App Store → uncheck options
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2The question states 'individual apps'? Are you simply looking to disable them completely? If so, this question is a duplicate.– grg ♦Commented Apr 29, 2015 at 15:41