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I installed the 1st beta of El Capitan, and now I cannot update anything via software update, including OS X itself. I just get the "couldn't communicate with a helper application" error. I even reinstalled the OS, and Im still getting it. Anyone have any ideas? I tried manually installing via command line using ""softwareupdate --install --all"but I get:Jul 3 22:16:20 softwareupdate CLI[4500] <Error>: /usr/sbin/softwareupdate: Service connection invalidated!Help?