How to Download macOS Sierra Installer App

If you're looking to download the macOS Sierra installer app, there are a few steps you need to follow carefully. The first thing to note is that once you install it, the installer will automatically be deleted.

Before clicking Install, take a closer look at the size of the download (around 6GB). This should give you an idea that it's not just an update, but the complete installer for Big Sur. Eventually, a message 'Are you sure you want to download macOS Big Sur' will appear.

To start the download process, open Software Update and click on the link to open the Mac App Store on the Big Sur page. Make sure you're using Safari and that the Mac App Store app is closed before proceeding.

Once the installer has downloaded, do not click Install yet. It might look like an update rather than the full version, but the size of the download should give it away. You'll see a message 'Are you sure you want to download macOS Monterey' will appear.

To download Big Sur (or any other version of macOS) from the Mac App Store, follow these steps:

1. Click on this link to open the Mac App Store on the Big Sur page.

2. Find the 'Install macOS Monterey' app in your Applications folder and you'll need it for the next steps.

If you install Sierra, the installer will automatically be deleted (plus it won't install if you're already running Ventura). Once the installer has downloaded, do not click Install yet. It might look like an update rather than the full version, but you'll see from the size of the download that this is the complete installer for Monterey.

To download macOS Sierra, follow these steps:

1. Click on this link to be taken to the macOS Sierra page on the Mac App Store.

You can still download the installer for Sierra from the Mac App Store – as long as you know where to find it – searching the Mac App Store will not work. Apple only replaced Sierra with Ventura in October 2022, but if you don't want Ventura on your Mac you might be looking for Sierra.

Macos sierra installer app