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I am trying to update from macOS 10.12.6 to 10.13 and I can't find 10.13. I can only find subsequent releases, which can't be updated until we first upgrade to 10.13.
[Re-Titled by Moderator]
iMac 21.5″, macOS 10.12
Niel has you covered, so just to clarify, Apple only full full installer offered is the latest version, 10.13.6 on your case.
macOS High Sierra - Technical Specifications
General Requirements
Mac Hardware Requirements
For details about your Mac model, click the Apple icon at the top left of your screen, choose About This Mac. These Mac models are compatible with macOS High Sierra:
macOS High Sierra - Technical Specifications
https://itunes.apple.com/app/macos-high-sierra/id1246284741?mt=12
macappstores://apps.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, there are 2 cures...
If you’re short of bandwidth or data… Disconnect from the Internet & set the Date back to 2014, then you can run the Install MacsOS High Sierra App in Applications, so expired Certificates are not expired.
Or best... trash the Install MacsOS High Sierra.app in Applications, empty trash & restart, then a new copy of a more recent version can be downloaded…
Back up your data, check your applications for compatibility, click here, and then on the download link for High Sierra.
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High Sierra 10.13 update not showing on my Mac
