I can not update my MacBook Air , its saying update macOS not available for Macintosh
need assistance updating Mac so I down load Microsoft
MacBook Air 11″, macOS 10.14
Click on the Apple menu--->About This Mac.
Please tell us the model number (including the year) of your Mac. Also, tell us which MacOS you're running...it's on the same section. We need this in order to know what the latest MacOS you're able to update to.