You're correct about MAS apps stopping when the certificate expires. Several of my purchased MAS apps were broken to the point of being unusable when Apple's M

You're correct about MAS apps stopping when the certificate expires. Several of my purchased MAS apps were broken to the point of being unusable when Apple's MAS certificate expired [1]. It happened in mid November 2015, but Apple didn't completely fix it until the end of January 2016 [2]. [1] http://www.macrumors.com/2015/11/12/mac-app-store-apps-damaged-expired-receipts-issue/ http://www.macrumors.com/2015/11/12/mac-app-store-apps-damag... [2] https://support.apple.com/en-au/HT205702 https://support.apple.com/en-au/HT205702