How to Completely Prevent the Mac App Store from Downloading the MacOS High Sierra Installer The next tip will detail a trick to accomplish that.

Or perhaps you want to be absolutely certain that the Mac App Store does not download the installer for High Sierra. Some Mac users may want to maintain automatic software downloads and updates however, but still avoid macOS High Sierra and the macOS High Sierra installer. This alone should prevent macOS Sierra or Mac OS X El Capitan from downloading the “Install macOS High Sierra” file onto your Mac into the Applications folder, and prevent from sending the notification that it’s ready to install.

Uncheck the box next to “Download newly available updates in the background”.

Go to the  Apple menu and choose “System Preferences”.

The first thing you can to prevent High Sierra from automatically downloading do is toggle system preferences to prevent the automatic downloading of updates in the background.

How to Stop MacOS High Sierra Installer from Downloading Automatically If you do not want macOS High Sierra to be automatically downloaded onto a Mac, maybe because you’re avoiding the macOS update or postponing it while a particular bug or issue is sorted out, we’ll walk through a few steps on how to prevent a Mac from automatically downloading the MacOS High Sierra installer.

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