App Store broken after updates

I Contacted Apple support and they couldn't screen share because of this problem. Their only suggestion was to use time machine and restore to before the problem began or reinstall OS X. Save everything you have been working on after the restore point To a flash drive or it will be gone. Reboot the computer and hold the Command and R keys. Follow th instructions. I restored bac to March 28th because I noticed the problem on April 3 rd. So far so good but make sure you have some time set aside to work on this.

Following the updating of a number of iPad apps on my MacBook Pro today (April 18) I had EXACTLY the same problems occur as mzagor described in an earlier post. Everything seems identical in my screen displays to the screen shots shared by mzagor, with the addition in my case of the iTunes Store not loading and throwing up error message windows stating that, "iTunes can't verify the identity of the server "init.itunes.apple.com". The certificate for this server is invalid. ..." 7 additional similar certificates follow as iTunes attempts to log in to other Apple servers.

I spent over an hour on the phone with an Apple tech, not knowing that others were having a similar issue as I. We almost got to the point of reinstalling Mavericks - but I balked at that. The well meaning tech suggested that this could be a hardware issue and that I should have the computer checked at an Apple Store (90 minutes away).

HOWEVER! on this same MacBook Pro, I can, using a DIFFERENT User login (which had been previously created) successfully log into;

- the iTunes Store,

- the App Store, and get to

- the Apple web site Support section through Safari,

without any issues or error messages and with the each of the screen displays showing up as they should. I can log into my Apple ID account without issue.

It would appear that there is a connection to the stated difficulties I am experiencing, with the act of updating apps using the App Store in Mavericks (v10.9.5)

Hopefully, the issue will be acknowledged and a solution will be found and shared quickly.

Everything working as expected in a different user account narrows the issue down to your user account, which isn't something a patch or update from Apple will likely repair. And it isn't something easily tracked down.

The other issue is you are using an out-of-date version of OS X. Apple doesn't devote engineer time to old versions as they are busy with the next update of the current version and the future version of the next upgrade of OS X that will be released probably after summer.

I tracked down a solution in a neighbouring discussion thread that worked for me.

I deleted all files marked as not trusted from the Login Keychain window. Then, I exported VeriSign Class 3 Public Primary Certification Authority - G5.cer certificate from my Login Keychain to my computer's Desktop and then deleted the file from the Keychain window.

I am now able to access the App Store with the correct screen display, along with iTunes and the Support section of the Apple web site. I no longer get the certificate error message, and I can once again log into my Apple ID account.

I sure appreciate the sharing of ideas, expertise and solutions!

Cheers

Phil

So the issue was in the keychain associated with your user account?

Where is the discussion in which you discovered this solution? I want to see what the difference is in the keychain for my user account.

I found the solution in the following thread (begun by jorgfromfra) - a number of people worked to the solution:

HT204659 app store unavailable following security update 2015-004 (Mavericks)

I had the EXACT SAME PROBLEM as 'mzagor' described. I also researched the heck out of it, and tried several suggested fixes from the Mac Support forums. The final solution was that described above (Phil Townsend on Apr 20, 2015 12:32 AM) however, I don't know if it only worked in combination with some other fixes. Basically, it comes down to cleaning up KeyChain stuff (described lots of places), and removing existing cert database files under /var/db/crls/ directory. Mac App Store and ITunes are HAPPY AGAIN! Note: I'm running Mavericks 10.9.5.