Unable to sign into App store, itunes, game center after upgrading to El Capitan


Seriously, I can not login to App store, iTunes and even Gam center using my Apple ID which used to work without such this trouble in Yosemite before updating to Mac OS X 10.11 El Capitan.
I constantly get UNTRUSTED_CERT_TITLE warning. My Account should be still good since I am able to login to iCloud.
Need someone’s experiences :frowning:


You can get rid of trouble by deleting the certificates in Keychain Access.


It works. Cheers!