Continuing misleading error alerts show that Apple has not fixed problems in the Mac App Store after all.
App Store
Apple’s explanation to developers of the recent App Store certificate fiasco raises more issues than it answers.
Strange reports of apps being damaged and needing to be replaced, and others just crashing: Apple is to blame, and is not giving us clear information.
My Mac refuses to run apps I bought from the Mac App Store, telling me that they are damaged. Why?
An app installed from the Mac App Store was faulty. How can I download it again?
App stores are shop windows for their operating systems and host hardware. Getting them wrong is bad news for vendors.
Are you too fed up with the profusion of updating systems, and poor interface in the App Store’s service?
Could I use OS X Server to conserve bandwidth of our Internet connection?
For most apps which you install or update, there is extensive information about exactly what was installed. This article explains how to access that.
Can I set my Mac up to run without an Internet connection?
The Eclectic Light Company 