I have a 2015 mac and need an update. What do I do?
I have a 2015 MacBook Air and need to update the OS system. What do I do?
The model year of a MacBook Air is available at Apple menu > About This Mac.
An early 2015 MacBook Air can be upgraded to the latest version of Monterey macOS 12 but not to Ventura. See: How to download macOS - Apple Support