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

I am using the latest MacBook Pro 2018 version. After upgrade to MacOS Mojave, I cannot sign out, login App Store or View my account. It always show "Cannot Connect to App Store". I also upgrade my iMac to MacOS Mojave, my iMac does not have this issue.


How can I fix this issue on my 2018 MacBook Pro?


Thank you

MacBook Pro TouchBar and Touch ID, iOS 12

Posted on Sep 24, 2018 7:50 PM

Reply
379 replies

Oct 8, 2018 1:03 PM in response to testingtestingtesting

Hey Testing,


I had exactly the same problem with App Store showing only Updates. A bit exhaustive searching and I found a solution to the problem.


This problem is most likely caused by another copy of App Store.app somewhere on your filesystem. If this is your problem it is easy to fix, the problem is locating the other copy of App Store.


You can do this by starting System Information by clicking on the 'Apple' Menu Icon, then About This Mac. Once System Information starts, click on the System Report... button. In the left hand side pane, select Software and then Applications. Give the report a bit of time to generate (1-5 minutes). Once it appears in the right hand pane scroll through the application list until you find App Store.


On my system I had three copies, the current version from Mojave, and two others from CarbonCopy SafetyNet Backups. You can find the location of each by first clicking on the application, and then looking at the Location in the pane just below the Application List pane. For example I had a copy of App Store located in:


/_CCC\ SafetyNet/2016-09-08\ \(September\ 08\)\ 15-00-23/

/_CCC\ SafetyNet/2016-09-08\/2016-09-08\ \(September\ 08\)\ 15-20-44/


As these were rather old backups of the App Store.app, I simply deleted both of these directories. Once I freed myself of these old backups the App Store worked perfectly. I don't believe a reboot is necessary, but I did one none the less.


For information on why this happens and more explanation see the following very helpful posts:


mac appstore - Mojave App Store is only showing Updates tab - Ask Different

mac appstore - Mac App Store not working on macOS Mojave 10.14 Beta 1 (18A293u) - Ask Different


Tried to talk with AppleCare support and was told to wipe my hard drive and reinstall MacOS (um, no thank you), or not to make changes as the advise might damage your operating system (from a filesystem backup copy???). Whatever.


Eventually AppleCare may figure this out, as with all advise given in forums, please proceed with caution.


Regards,


Bill Gertz

Oct 8, 2018 6:55 PM in response to kilgoresalmon

I am proud and grateful for all the ideas. I now can open the app store. Following the lead from Mr Gertz above, I discovered that I had three app store applications on my computer . One was buried in a folder on my desktop, and on was found by going through my old hard drive accounts looking for a comparable date, which I did.


So all is well (right now). Thanks to all.

Oct 9, 2018 6:55 AM in response to bill.gertz

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. User uploaded file Attempting to delete immediately gets results in User uploaded file 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

Question marked as Helpful

Oct 11, 2018 12:52 AM in response to brianyen0

I had same issue of not being able to sign in to app store. After trying everything that was written in previous posts, this worked for me:


a) Open KeyChain Access

b) Click on System Roots

c) Double click on "DigiCert High Assurance EV root CA"

d) Expand "Trust"

e) Change "When using this certificate" from Use System Defaults to "Never Trust"

f) Restart the computer

g) Do steps a to e again but change "Never Trust" to Use System Defaults


After this, I was able to login to App Store and download apps etc.

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

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