I posted this question a while ago: App Store "Updates Available" notification pops up despite having notifications turned off?
This is still driving me crazy and making me incredibly angry-- nothing is more obnoxious to me than my computer being hooked up to my large speakers, and in some random moment, it just blurting out at incredibly loud volume "DING DING DING!" as Mac OS is telling me App Store has updates available-- despite having notifications TURNED OFF for App Store (grrrrrrrrrrrrrrrrrrrrrrr).
I want to find this stupid obnoxious audio file and ZERO IT OUT.