I don't see any options for deactivating automatic downloads for OS X and individual apps in the App Store app.
MacOS – How to turn off automatic downloads and updates
mac-appstoremacossoftware-update
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Best Answer
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: