This may be a consequence of the recent update of dbus.
Any time dbus is updated, or you think dbus is not working properly, the following won't hurt and can possibly fix the problem. This just unloads the startup scripts associated with the old version of dbus and then loads them again (this time for the new version).
$ sudo launchctl unload -w /Library/LaunchDaemons/org.freedesktop.dbus-system.plist
$ launchctl unload -w /Library/LaunchAgents/org.freedesktop.dbus-session.plist
$ sudo launchctl load -w /Library/LaunchDaemons/org.freedesktop.dbus-system.plist
$ launchctl load -w /Library/LaunchAgents/org.freedesktop.dbus-session.plist
Let me know if this helps