macOS Sierra is downloaded but can't install I have downloaded the macOS Sierra from app store but unable to install it. It's not displayed in updates section...
Did you look in your applications folder? Usually it downloads there. If you open your Applications folder there's an app called Install macOS Sierra


Found at:  https://www.reddit.com/r/applehelp/comments/53qqnp/macos_sierra_downloaded_but_not_installed/