Resolving Mac App Store download issues by removing cache folder

Summary

This article will assist you with resolving download errors from the Mac App Store. Occasionally, Mac App Store downloads fail, and give the following error message: "The product distribution file could not be verified. It may be damaged or was not signed."

Environment

MacOS

Directions

1. In Terminal enter: open $TMPDIR../C/
2. A folder will open in Finder showing a number of cache folders for different applications.
3. Delete the "com.apple.appstore" folder inside cache.
4. Quit and relaunch the App Store application.
5. Attempt Mac App Store download of desired app.