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

OK look at this screenshot and look closely at the path at the bottom of the Finder Window. This is what you should see. Like I said I am not an expert, but you can try and add a folder called Trust Settings. But do this at your own risk, or wait for a better info. If you do add it, reboot. It might or might not help, but please wait for expert help.

Thanks for all your effort here. I’ve been able to connect to App Store throughout however I only have the update tab showing on the App Store left hand menu. I was hoping that this process would solve issue but no luck. My iBooks works properly and when I create additional admin account App Store works and is displayed properly. Any insight you may have would be appreciated.

Oh I understand that the object is to open the App Store app. And I can't.

What did happen on two occasions is when I clicked on the Apple logo, the App Store had reference numbers attached to the App Store app for updates. It does not allow me to enter, but it has delivered certain updates. So I can receive an update by clicking the reference to it on the Appp Store app but I can't open the App store app. Just the new individual app updates.

Yes I did, however the fix appears to only be temporary. I followed the steps, rebooted, and was able to open and log into Apps. This morning, when I turned on my computer, I can't log into Apps again.

How to find this rule in Little Snitch? I've looked through all the rules and there was only one listed that I could positively identify that was for the App Store.

What does it look like and what section would I find it in?

Thanks.

Hi Bill,

Like you I had an old version of the Appstore in the CCC Safety net. I think however this was the version prior to Mojave. I managed to delete it, which resolved the Appstore issue (hooray), alas now I cannot empty the trash. It will not let me empty the trash as a file is in use. Attempting to delete immediately gets results in This is not the end of the world, as I am sure Apple will release an update to resolve the Appstore issues. But a little annoying.

Bill Budd

FINALLY!

Thanks so much, this finally did the trick.

I'd just add to this that I didn't need to restart, just save, then back in and change it back and save again, I was then able to login on the first try with zero issues.

Thanks again.

Thanks for this - oddly, while these steps in Keychain Access did restore my ability to log into the Mac App Store and see my account, the odd thing is that it shows all of my apps as ready to download (iCloud logo with arrow pointing down.) In other words, it doesn't realize that I have all of my apps already downloaded. I have plenty of apps that need updates, but the App Store isn't recognizing this, and when I click the download icon on an app (which is already installed,) it just opens the pre-existing app!

thanks! this worked for me. i tried to log out of iCloud account and back in, and didn't work, so i googled and found your tip. it worked and it was easy to do. i know upgrading the OS always will introduce random bugs, and this is quite a big one that Apple got wrong. 😟

Fantastic, and thank you. I have a comment about using terminal, I'm just not that versed in terminal (sorry, I swear im still an apple devotee) and i was able to accomplish these steps in finder. I was able drag and drop a copy of *.plst to desktop, removed it from the directory, then restarted worked like a charm. Thank you so much for the guidence.

BocaBoy,

I found this thread and hopefully you will still be able to give me the answer I need. I did what you said and now it works can you tell me how to TrustSettingsBackup.zip? I did number 1 again as well but do not see TrustSettingsBackup.zipanywere on my iMac? Were will I find this please show me were it is asap.

Thank you I am glad this worked for me too.

TrustSettingsBackup.zip should be in /Library/Security. It is only backed up so that it can be restored in the event something goes wrong. If you can't find it, don't worry. If you do find it, and everything is corrected with the App Store, you can delete it.

I thought it was fixed just got back on checked my apple store and went back to a blank screen so it did not work for me. I was happy for a little while. Oh well hope they release a fix for it. Also do not know were to look for this /Library/Security?

I sure hope they will fix it soon I just clicked on my name and still no apps showing that I purchased. Thnak you anyway for your help.I hope there is a Apple rep looking at all issues I know the high sierra you can give them feedback in the apple store aand there is none now?.

Library/Security are system folders under the root. I would tell you, as I did in my original post, to not attempt this fix if you're not comfortable working at the system level. There's way too much chance that you'll break something.

I feel pretty confident that this will be fixed in 12.14.1. If, however, you need it fixed faster, take it to the Genius Bar and have them run the commands for you.