Click the in the top-left corner of your screen.
If Big Sur is available for your Mac, click to begin the download. Method B: Via the Mac App Store
: Ensure you have at least 35.5GB of available storage if upgrading from macOS Sierra or later. advertisement macOS Big Sur Free Download
Select (or System Settings on newer versions). Click on Software Update .
This is the simplest way to get the latest compatible version for your specific Mac. Click the in the top-left corner of your screen
Before downloading, verify that your Mac is officially supported. Big Sur requires a 64-bit Intel or Apple Silicon (M1) processor and at least 4GB of RAM. : 2015 or later MacBook Air : 2013 or later MacBook Pro : Late 2013 or later Mac mini : 2014 or later iMac : 2014 or later iMac Pro : 2017 or later Mac Pro : 2013 or later 2. Prepare Your Mac
If Big Sur doesn't show up in your settings, you can find it directly in the store. How To Install macOS Big Sur | Beginners Step by Step Guide Select (or System Settings on newer versions)
: Use Time Machine or another method to back up your files before any major OS update.