Not running Sierra on your Mac? Want to hide the annoying "Update to Sierra" banner that appears in the App Store? http://www.lifehacker.com.au/2016/11/hide-the-giant-macos-sierra-update-banner-in-the-mac-app-store-with-a-click/
Not running Sierra on your Mac? Want to hide the annoying "Update to Sierra" banner that appears in the App Store? http://www.lifehacker.com.au/2016/11/hide-the-giant-macos-sierra-update-banner-in-the-mac-app-store-with-a-click/