Peterh1967a wrote:
I don't want to download Catalina just yet, and so I want to download Mojave instead (I am currently running High Sierra). I follow the link to the app store from the apple support site and have downloaded the latest version of Mojave.
When I try to install it (from the app store, not utilities) I get the message "This copy of the Install macOS Mojave.app application is damaged, and can‘t be used to install macOS."
Anyone have a solution please?
You do not say what exact Mac /model /year /size /retina /touchbar is this
or
what exact macOS you are currently running?
Typically a slow internet download speed is what corrupts a download.
Delete the corrupt /damaged .app that you downloaded and empty the trash.
Try again from a different Network, or try using Ethernet connection if your WiFi is suspect.
macOS 10.14 Mojave - Technical Specifications:
https://support.apple.com/kb/SP777
Upgrade to macOS Mojave - Official Apple Support download:
https://itunes.apple.com/us/app/macos-mojave/id1398502828?mt=12