updating sierra
can't update my mac os sierra 10.13.6. please direct and advise.
iMac 27″, macOS 10.13
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Don't use FireFox for this link…
https://itunes.apple.com/app/macos-high-sierra/id1246284741?mt=12
If you get a corrupted message...
Naw, not damaged, it's just that you have an old copy already in Applications, Trash the Install MacsOS High Sierra.app in Applications then a new copy more recent version can be downloaded.