Updates
How do I update my MacBook Air when it's still on MacOS Sierra?
MacBook Air 13″, 10.12
Question marked as
What you can update to, will depend on your exact model / year of Mac, and not on the OS it is running.
If your Mac is supported for macOS 12 Monterey see here for how to upgrade: link-> How to upgrade to macOS Monterey - Apple Support
Otherwise, you can get an older macOS version that is still newer than Sierra here: link-> How to get old versions of macOS - Apple Support