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The operation couldn’t be completed. (com.apple.commerce.client error 500.)

when trying to download an app from App Store, I am getting this message after signing in to my Apple ID. "The operation couldn’t be completed. (com.apple.commerce.client error 500.)" and unable to download


MacBook Pro 13", macOS 10.14

Posted on Mar 9, 2019 3:06 PM

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Question marked as Top-ranking reply

Posted on Mar 9, 2019 5:20 PM

Do a backup, preferably 2 backups on 2 separate drives.




Quit the application.




Go to Finder and select your user/home folder. With that Finder window as the front window, either select Finder/View/Show View options or go command - J.  When the View options opens, check ’Show Library Folder’. That should make your user library folder visible in your user/home folder.  Select Library. Then go to Preferences/com.apple.appstore.plist and com.apple.appstore.commerce.plist.  Move the .plists to your desktop.




Restart the computer, open the application, and test. If it works okay, delete the plists from the desktop.




If the application is the same, return the .plists to where you got it from, overwriting the newer one.




Thanks to leonie for some information contained in this.



5 replies
Question marked as Top-ranking reply

Mar 9, 2019 5:20 PM in response to ammar46

Do a backup, preferably 2 backups on 2 separate drives.




Quit the application.




Go to Finder and select your user/home folder. With that Finder window as the front window, either select Finder/View/Show View options or go command - J.  When the View options opens, check ’Show Library Folder’. That should make your user library folder visible in your user/home folder.  Select Library. Then go to Preferences/com.apple.appstore.plist and com.apple.appstore.commerce.plist.  Move the .plists to your desktop.




Restart the computer, open the application, and test. If it works okay, delete the plists from the desktop.




If the application is the same, return the .plists to where you got it from, overwriting the newer one.




Thanks to leonie for some information contained in this.



The operation couldn’t be completed. (com.apple.commerce.client error 500.)

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