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I have tried several times to upgrade from OS X El Capitan 10.11.6 to Mojave. Each time I get this message:
This copy of the Install macOS Mojave application is damaged, and can‘t be used to install macOS. What do I do? I need to upgrade to run some new apps.
MacBook Air 13", OS X 10.11
Go into Finder and open up your Applications folder. The Mojave installer will be listed there and be called "Install macOS Mojave". It's a circle icon with a downward facing arrow.
Drag this to the trash and empty your trash. You may need to restart before it lets you empty.
Then, simply download a fresh copy of the Mojave installer from the App Store and you should be good.
Go into Finder and open up your Applications folder. The Mojave installer will be listed there and be called "Install macOS Mojave". It's a circle icon with a downward facing arrow.
Drag this to the trash and empty your trash. You may need to restart before it lets you empty.
Then, simply download a fresh copy of the Mojave installer from the App Store and you should be good.
Thanks so much. Didn't realize I needed to trash anything. It seems to be working.
Mojave upgrade
