Multiple Apple Apps Suddenly Not Working.
General Problem: Several apps (iTunes, Mac App Store, Safari) are suddenly not working properly or at all.
Specific, repeatable Symptoms:
- On launch, iTunes gives warning of an “expired certificate” for init.itunes.apple.com and xp.apple.com
- The App Store application will launch, but no information will load, regardless of what section I select.
- In Safari, the Apple Support menu layout is severely messed up. While all other sites seem to be working fine, the fact this appeared at the same time as the other symptoms seems a little more than coincidental, especially considering that the same section works fine in Chrome and Firefox on the same account.
Troubleshooting Attempts and other Data.
- Mac Pro (2013), 10.9.5 with all updates. (Yosemite is not an option at this time)
- All software is up to date for this OS version.
- These symptoms do not appear on other Macs on the same network.
- These symptoms do not appear on another account on the same Mac
- Repaired permissions from the Recovery Partition - no change in behavior
- Reset Safari - no change in behavior
- Ensured Date/Time is correct - no change in behavior.
- Reset caches in iTunes - no change in behavior.
- Ran through both "Can't connect to the iTunes Store" (http://support.apple.com/kb/TS1368) and "iTunes: Advanced iTunes Store troubleshooting" (http://support.apple.com/kb/TS3297) - no change in behavior.
- Ensured all certificates in Keychain access were set to system default - no change in behavior.
From the above symptoms, it would seem that the trouble is most likely a preference problem (or series of them). The thread at https://discussions.apple.com/thread/5050632 also seems to indicate at least one of the problems lies in a preference issue.
Does anybody have any guesses as to which files need to be rebuilt in order to restore proper behavior again?
Mac Pro, OS X Mavericks (10.9.5), Late 2013