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When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.
I'm trying to upgrade my late 2009 iMac 27" from Sierra to High Sierra. When I find the High Sierra page in the App Store, I click "Open" and after a pause get a message: "This coy of the install macOS High Sierra application is damaged, and can't be used to install macOS." What options do I have now to upgrade to HS?
iMac Line (2012 and Later)
Has one attempted to download High Sierra more than once ? If Yes, check in Applications folder for " Install High Sierra " If it exists, drag and Drop to Trash and Empty Trash.
Has one attempted to download High Sierra more than once ? If Yes, check in Applications folder for " Install High Sierra " If it exists, drag and Drop to Trash and Empty Trash.
Welcome and Thank you too.
Do come back to the ASC Forums, in the future, if / or when additional question may arise
Thanks, that did the trick. I re-downloaded it and it ran successfully!
Upgrade to High Sierra "is damaged, and can't be used to install macOS" in the App Store
