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Trying to upgrade from Sierra to High Sierra. Link on the Apple site High Sierra page https://support.apple.com/en-us/HT208969 to the App store - which only has an 'open" button not "get". Pop up box states the application is damaged and can't be used to install macOS. Clicking on macos High Sierra from search field returns "no results". Any ideas on what I can do to upgrade to High Sierra?
iMac 27" 5K, macOS 10.12
Naw, not damaged, it's just that you have an old copy already in Applications, there are 2 cures...
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... trash the Install MacsOS High Sierra.app in Applications then a new copy can be downloaded.
Naw, not damaged, it's just that you have an old copy already in Applications, there are 2 cures...
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... trash the Install MacsOS High Sierra.app in Applications then a new copy can be downloaded.
Use Safari as your browser, people are experiencing problems using Firefox,
How to upgrade to macOS High Sierra - Apple Support
Connect your mac to your router via a cabled connection, WiFi too unreliable.
Do not use the mac while it is downloading, do not use other devices that
share the same internet connection while downloading.
And the link does work see below, make sure it says 'Get'
DISCLAIMER: I didn't have a previous copy of the High Sierra installer already DL'd. I am just looking to looking to upgrade from Sierra to High Sierra.
Followed the instructions on resetting the date but no go. Firefox and iTunes squawked about untrusted certificates regarding the date. All links on the Apple site point to dead links ("The item is not available on the iTunes Store.") . I have an mid-2010 iMac which is running just fine for my needs but I need to update to High Sierra to take advantage of HEVC. Is there any other way to upgrade to High Sierra at this point?
Thank you! I did not realize that there was an unused High Sierra in my applications. Deleted it and the app download worked just fine. ;-)
You're welcome, great news! :)
Ah, setting the date back only works for of you already have an older copy, it would work against you if trying to download a new copy. :)
Use Safari...of course. You'd think a link is a link is a link...
Merci beaucoup, Eau Rouge! 👍
upgrade from Sierra to High Sierra
