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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.
Want to upgrade from Yosemite 10.10.5 to High Sierra 10.13 but App Store only has latest version and when Open, pop-up says Installer is damaged and cannot be used.
iMac Pro
Choose Applications from the Finder's Go menu, throw the installer away, and download another copy.
(191402)
Choose Applications from the Finder's Go menu, throw the installer away, and download another copy.
(191402)
The installer for Mac OS High Sierra 10.13 is damaged and cannot be installed
