Mac App Store - Sign In/Purchase Error Message

Logging in and updating my settings in the iCloud section of OS X System Preferences fixed the problem for me.

Hi tanker01,

Thanks for reaching out to the Apple Support Communities. From your message I can see that you're having trouble signing into the App Store. This article will give you the best troubleshooting steps to take, along with the next steps to take if you continue to have issues: If you can't connect to the App Store, iTunes Store, or Apple Books - Apple Support.

Cheers

Just restart the system and the issue will get resolved. It worked for me hope it works for you as well.

Signing out and back in to iCloud made it so I could sign back in to the App Store but it still won't let me download anything. I don't understand what is going on. I just used it a few days ago to download 1password and magnet when i first got my MacBook.

I am trying to add programs to my iMac. I keep getting com.apple.commerce.client error 500. What do I need to do to be able to download programs?

Hi all,

I am having same problem. After entering Apple ID and password via AppStore, I do not see I am actually singed in.

Tried with payed and free apps, got same result.

Same ID and password are working on my apple account via browser, iCloud, anywhere else, but AppStore.

app store com.apple.commerce.client error 500

Have tried all trick from this channel and from Office support page, also mentioned in this channel, but no luck.

I am having the same problem with a brand new MacBook Air (2018). Reboot also did not fix for me.