I suspect a damaged install.
Let's do an uninstall/reinstall. Be sure your account has admin privileges.
Uninstall CS6, checkmark "Remove Preferences"
Use the CS Cleaners to remove anything that might interfere with a reinstall
Use the CC Cleaner Tool to solve installation problems | CC, CS3-CS6
Use Disk Utility to repair permissions.
Reinstall CS6 and immediately apply the update.
If you need a fresh CS6 installer, you can get it here.
Gene