update os
MacBook Air (13-inch, Late 2010) os update . Some software can not be downloaded on this version. Please advise
Windows, Windows 6
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That MacBook Air tops out at High Sierra macOS 10.13.
That version is no longer supported.
Various apps including Microsoft Office will support the three most recent versions; only as far back as Mojave macOS 10.14.
For the High Sierra upgrade, tap or click > How to get old versions of macOS - Apple Support
Use only Safari for the High Sierra installer download.
Have a complete backup prior to the High Sierra upgrade.