After upgrade to MacOS Mojave, I cannot login or connect to App Store.

I tried most of the suggestions. The only one that worked for me was to create a new user and update the apps there.

Still can't login to AppStore in my primary account.

A lot easier to make another Admin account. That worked for me at least until Apple fixes this.

Did you try to make an additional ADMIN account?

Yes. 2 hours ago, I formatted my mac and re-installed Mojave. And I've got back the AppStore.

system.log. You can leave Console open as you try and log in and watch it update the log with any error it encounters. Note the time before you log on so you can easily isolate the entries. Alternatively, you can search on App to find the related entries.

The only thing that worked for me was to do a search in my laptop for all app store apps. I found three. I deleted the two oldest ones and the remaining app store app began working right away.

Don't remember if I restarted the laptop or not.

After trying all the various security fixes without success I tried connecting to my iCloud in the system preferences which then allowed the App Store to log me in. However, I still cannot make any downloads from the App Store so still not resolved :/

I'm having the same issue.

As a test, I created a new Apple ID, generated a new user account on my Mac Book Pro, then attempted to log into the App Store on that new account using the new Apple ID. The same problem occurred.

The console shows several App Store errors when I first bring it up:

- "Unable to load Info.plist exceptions (eGPUOverrides)"

- "AWSNetworkQualityInquiry: The network quality inquiry couldn't be initialized for metrics."

- "AWSKeepAliveSession: [....] Failed to acquire assertion"

- "AMSURLRequest: Failed to fetch GUID schemes from bag" (several occurrences of this message)

Clicking on "Sign In" generates these App Store messages in the console:

- "ITLib xpc error: Connection interrupted"

- "Error getting iTunes pref."

- The above KeepLiveSession and URLRequest messages as well.

Lastly, entering the password and selecting "Sign In" generates these App Store messages:

- The above KeepAliveSession and URLRequest messages

- "Sign in failed with error code: -999, description: <private>"

So I got tired of waiting around for a response from Apple. Luckily, my wife owns two MacBook Airs, one for home and one for work. I waited to update the work machine because it was having some other issues. So today in short I restored my wife's home MacBook Air that was having the issue from Time Capsule backups of her work one that has no issues with the App Store. All I had to do is make some minor tweaks with some software installs and uninstallation, but all is good now. So if you have another Mac and want to try this, it should work!

Just wanted to post an update, that I did an application cache clean today with a PRAM reset. While I wasn't having any issues. It does feel like it has smoothed things out.

I noticed that clearing cashes deleted my exiting installed updates list for the App Store, but it still functions as normal.

Exxplora2 wrote:

You might want to check any network filters you have on your wired network. I had a similar problem and was able to determine that my third party network filter (Little Snitch) was not reading the code signature for the app store correctly. A subsequent update to the third party network filter solved my problem.

Tried that here too - unfortunately no luck with with the Little Snitch update nor with disabling LS.

Do you know how to take a screenshot? If not press cmd-shift-4 then using the + on the screen which is now your cursor highlight the part of the screen you want. As soon as you release the mouse button the picture is taken. Then post it here.

Hi decided to revert back to High Sierra as Mojave started freezing and was slow.

I did not get one response from Apple regarding App Store not connecting.

Since that issue was affecting users during the beta stage, it should be still happening.

Thanks so much Checkyorself289!!

Finally, after spending 3 days digging into all forums finally I could successfully login into App Store just following the AppCleaner directions without re-installing the app!!

Important note: i had to follow the procedure twice since first time, after rebooting and opening AppStore, instead of logging in into appstore, I clicked one app update and same problem again....that was when i run again the appcleaner, rebooted, then logged in as first action after opening the AppStore App and worked well!!! So be sure your follow exactly these steps: 1)AppCleaner 2)reboot 3)open AppStore App 4)Log-ing 5) start using!!!

Not sure what is happening with Apple but this is not really acceptable.....

Yeah I had the same problem where I couldn't get into the app store and sign in from a fresh new computer, a macbook pro 13 in. I was fiddling with the files but ended up just reinstalling mojave and now I'm able to sign in but still unable to download apps from the store or update existing ones. When I click "view information" under my account it says that it cannot connect to the app store even though other pages load so it's really bizarre.