I need to stay with OS X 10.10.2 because some legacy programs don't perform smoothly with later versions. Is there a way to completely prevent any OS X upgrade notifications from showing up?


To configure updates in OS X Yosemite:

Go to System Preferences > App Store

From there you can uncheck the settings for reminders on updates.

While you are at it, you may find other settings in the System Preferences that are worth checking out.

System Preferences App Store

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