My MacBook Air won't let me download any available Apps
My Mac book air will not let me download any available apps. It says it is the macOS Sierra. Can someone help?
[Re-Titled by Moderator]
MacBook Air 11″, macOS 10.12
Question marked as
In the Apple menu, select About This Mac, and post the MacBook Air model year. The model year determines which macOS versions you can upgrade to. You can minimally get to macOS 10.13 here, and maybe later.
More info: How to download and install macOS - Apple Support
Have a backup before the upgrade: How to back up your Mac - Official Apple Support