I'm ready to try it out, but what if I don't like it? If your Mac is older than any of the models listed above, it isn't compatible with macOS Big Sur. The following Macs work with macOS Big Sur: If you have the following model of Mac, you can download and install macOS Big Sur: With macOS Big Sur just around the corner, take a moment to consider whether you should make the leap right away or wait a few days (or even weeks) to update your Mac. Although Apple makes new software updates available to as many older devices as possible, there are always some reasons why it may not be in your best interest to install the latest and greatest right on day-one, even if your Mac is compatible.