After a recent article on how to stop receiving notifications from the App Store about freshly baked OS X betas if you’re enrolled in the public beta program, I received a few related questions: How to install the production release of El Capitan, not the final golden master version? And how to get out of the iOS beta.
These answers are less pretty than unchecking a box and clicking a button. Apple has relatively detailed instructions at its Unenroll page, but I’ll be a little more blunt than it is.
Read more here:: Unenrolling from Apple's beta programs: back up or back out