If you don’t yet have macOS Big Sur installed, you can easily update to it from the Mac App Store. RELATED: How to Check Which Version of macOS You're Using How to Update to the Latest Version They appear as updates in the Software Update pane. These smaller updates contain security patches and other fixes. For example, if it says you have macOS Mojave version “10.14.1” installed, this means you have Mojave with the “.1” update installed. In the screenshot below, we have version 10.14 of macOS Mojave installed. As long as it starts with “11.”, you have Big Sur installed. If you see “macOS Big Sur” and version “11.0”, you have Big Sur. The name and version number of your Mac’s operating system appears on the “Overview” tab in the About This Mac window.
