App Store update shows different account I have a new app update I cannot install. When I review my installed user I see my @mac.com address. When attempting to update Cobook, I'm prompted for my @gmail.com account. The strange parts are: 


I'm clearly not logged in as the gmail account 
The gmail address is configured as a verified alternative ID





I'm running OS X 10.10.1 which was upgraded from 10.9 through the beta up to here. I see a separate issue on lion that doesn't address my problem.
If you are being prompted for another Apple ID when trying to download and update that means the app was originally purchased (downloaded) with that email address it is prompting you for.

In order to fix this, you must either continue to enter the password for the @gmail.com account to download future updates or re-purchase the application under your @mac.com email address.