I cannot login to App Store
Dear Community,
I updated my MacBook Air (Mid 2012) to El Capitan. Since then I am not able to log in using my or any other Apple ID to App Store, iTunes etc. Whenever I try to log in toApp Store it gets stuck; after entering my Apple ID and the correct password, I get the spinner. If I enter a wrong password, this is recognized and stated.
The console shows the following prompts:
18.10.15 09:21:28,126 App Store[382]: Unknown class FRToolbar in Interface Builder file at path /System/Library/PrivateFrameworks/StoreUI.framework/Resources/Base.lproj/FRStor eViewController.nib.
18.10.15 09:21:28,408 storeaccountd[243]: XPC error for connection com.apple.backupd.sandbox.xpc: Connection invalid
18.10.15 09:21:28,468 storeaccountd[243]: XPC error for connection com.apple.backupd.sandbox.xpc: Connection invalid
18.10.15 09:21:28,502 storeaccountd[243]: XPC error for connection com.apple.backupd.sandbox.xpc: Connection invalid
18.10.15 09:21:28,509 storeaccountd[243]: XPC error for connection com.apple.backupd.sandbox.xpc: Connection invalid
18.10.15 09:21:28,738 sandboxd[121]: ([243]) storeaccountd(243) deny mach-lookup com.apple.backupd.sandbox.xpc
18.10.15 09:21:28,759 sandboxd[121]: ([243]) storeaccountd(243) deny mach-lookup com.apple.backupd.sandbox.xpc
18.10.15 09:21:28,769 sandboxd[121]: ([243]) storeaccountd(243) deny mach-lookup com.apple.backupd.sandbox.xpc
18.10.15 09:21:28,780 sandboxd[121]: ([243]) storeaccountd(243) deny mach-lookup com.apple.backupd.sandbox.xpc
18.10.15 09:21:58,270 App Store[382]: Could not find image named 'NSImage'.
18.10.15 09:22:11,415 accountsd[245]: AIDA Notification plugin running
18.10.15 09:23:07,204 com.apple.xpc.launchd[1]: (com.apple.quicklook[391]) Endpoint has been activated through legacy launch(3) APIs. Please switch to XPC or bootstrap_check_in(): com.apple.quicklook
18.10.15 09:23:09,037 periodic-wrapper[392]: Running daily periodic task.
18.10.15 09:24:24,890 Notes[457]: Trying to sync all objects, but cloud syncing is disabled
18.10.15 09:24:24,902 cloudd[388]: Could not create primary backing account
18.10.15 09:24:26,590 Notes[457]: Continuing migration if necessary
18.10.15 09:24:26,594 Notes[457]: Migration state is (Unknown). Starting migration controller
18.10.15 09:24:33,583 AppleSpell[461]: Lexicon creation failed: Lexicon resources not found
18.10.15 09:24:37,309 Notes[457]: Trying to sync all objects, but cloud syncing is disabled
I hope you can help me. Thanks a lot!
Christian
MacBook Air, OS X El Capitan (10.11)