App store still showing beta release of El Capitan months after withdrawal from beta programs? Months after withdrawing from the beta program, following the guides for exiting, and then installing the production release of OS X 10.11 and installing 10.11 back when it was new, then restoring from a Time Machine backup prior to installing the beta release, everything was fine except app store still offers me beta releases. How can I stop this? Right now I am on OS X 10.11.2 the app store is offering me 10.11.4 beta though 10.11.3 is the current OS X version.
This worked for me! After unchecking the beta software enrollment in the system settings, I ran:

sudo softwareupdate --clear-catalog

man softwareupdate doesn't document this flag, but it seems to clear pending updates from the App Store, and on the next run of the App Store it will repopulate based on the current configuration of your system, therefore it will not show the beta update, but it will still show other regular updates for your system. 

man page: https://developer.apple.com/legacy/library/documentation/Darwin/Reference/ManPages/man8/softwareupdate.8.html