After installing Security Update 2015-002 yesterday Messages crashes as soon as I open it and Screen Sharing crashes as soon as I start typing the name of the system. I've reported these but am wondering if anyone else is experiencing these issues. ---------- I've also found that when I try to open iCloud from System Preferences I get: Preferences Error Could not load iCloud preference pane. Is anyone else seeing this? And add to this I get the same error with Internet Accounts in System Preferences.