Home / Mac / the product distribution file could not be verified. it may be damaged or was not signed.

the product distribution file could not be verified. it may be damaged or was not signed.

When this download problem occurs, it is generally the result of a corrupted file in a cache folder. If you run this command in Terminal:

a folder will open in the Finder showing a number of cache folders for different applications. Delete the com.apple.appstore folder, then quit and relaunch the App Store application and try the download again.

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