the operation couldn’t be completed. (com.apple.commerce.client error 500.). i cant login app store and when i try to download app , this error shows.

I called Apple and they said I have to erase my Mac to fix this. Then I pointed out how many other people have been experiencing this issue recently (by pointing them to this thread) and they transferred me to a senior advisor who helped me fix this issue by doing the following:

• Quit the App Store
• Open a terminal and run the following command "defaults delete com.apple.appstore.commerce Storefront"
• Reboot the computer, open the App Store and sign-in.

I ran into this same issue on another computer today and these instructions fixed it on that Mac too.

Steps listed in this post worked for me https://discussions.apple.com/thread/8644593 .

Basically remove the two files from ~/Library/Preferences/ while App Store is not running, then immediately restart/reboot the computer. Once the computer booted up, I logged in, started App Store and was now able to login with my account.

I general I hate giving this response, but have you tried rebooting?

I've gotten the same error pretty regularly after I've reinstalled macOS. During installation I skip the step where I provide my Apple login. When I eventually get around to installing an app from the store, I get this error.

(To be more specific, it appears that my credentials are accepted. If I enter the wrong password I get an error. But App Store continues to show the login options as if I'm not logged in.)

If I reboot my machine I am able to log into App Store.

hth!

(edit: added the word "regularly")

It helped me! Thank you so much!

Small note. Remote spaces after `s/` and `8/`.

`$ defaults write com.apple.appstore.commerce Storefront -string "$(defaults read com.apple.appstore.commerce Storefront | sed s/,8/,13/)"`

Write on terminal:

defaults write com.apple.appstore.commerce Storefront -string "$(defaults read com.apple.appstore.commerce Storefront | sed s/,8/,13/)"

After writing this command on terminal, you don't need to restart the computer, only restart the AppStore app and try to login or download again.

Had this issue too and worked with apple support to fix; the final solution was to close all applications, open terminal and type the following: defaults delete com.apple.appstore.commerce Storefront

there after press enter and restart your computer. After restart, open your App Store and login

1. Open Terminal
2. Write this command on Terminal:

defaults write com.apple.appstore.commerce Storefront -string "$(defaults read com.apple.appstore.commerce Storefront | sed s/,8/,13/)"


After writing this command on Terminal, please press Enter (Keyboard command). After that, restart AppStore application and then check if the problem is already solved.

This command " defaults delete com.apple.appstore.commerce Storefront" WORKED thank you so much. Macbook 2014 user here.

Please read If you can't connect to the App Store, iTunes Store, or Apple ....

Its really working. Also you need to restart your Mac after it. Thanks a lot

Read the entire Apple Support document. It concludes with the following:

• If you’ve tried all of the above steps and you still can’t connect, contact Apple Support.

Same issue. I think this is quickly becoming wide-spread after system reinstalls or changes. No solutions have worked.

I'm also getting the same error! need help

This did the trick for me. Had to set a bunch of preferences again, but it did the trick. No data is lost