Apple steps back in time to patch OS X 10.6 Snow Leopard

Apple yesterday took a trip back in time when it offered an update for OS X 10.6, aka Snow Leopard, an edition it last patched in September 2013.
The "Mac App Store Update for OS X Snow Leopard" -- quite a mouthful, even for Apple's naming conventions -- was issued Wednesday so that 10.6 users could continue to access the Mac Apple Store, the apps available there, and most importantly, the upgrade to OS X 10.11, or El Capitan.
Included in the update was a renewed digital certificate required by