3. Check that you have 'ticked' ( love the way our previous imperialist have terms for these things! ) the "Automatically check for updates" in the App Store System Prefs. BTW, that's the only thing I have ticked. "I'll download what I want, when I want. Thank you very much."
Interesting. This was ticked previously on my iMac, and apparently it was unticked during an upgrade (unless I did during the past 7 months when my brain wasn't functioning at all, and then all bets are off). Anyhow, thanks for this reminder. I have now reset my prefs. Jon, I'd try this first before resetting the app via the debug menu.
I do have that box checked. However, I also had installed OnyX and it is set, by default, to have App Store look for updates every seven days. I reset it to have it check every day. We'll see if that does the trick. Otherwise, I can always call Apple (I have Applecare).