Opt Out Apple Beta. Open the xbox insider hub app and unenroll from the beta. Now that apple has released ios 10, right now is a good time to leave the beta program.
Once you have unregistered your devices, you finally need to go to the apple beta software page, and formally leave the program. If you still want to leave the beta software program altogether, you can visit this link and sign in with your apple id to do so as well. Enter your enrolled apple id and password.
Visit the apple beta software program enrollment page, download an installer.
Click or tap log in at the top. Now that apple has released ios 10, right now is a good time to leave the beta program. Go to settings > general, and tap profiles & device management. Note that opting out of the macos beta program does not remove any existing beta software, it simply prevents further beta updates from arriving to the mac.