When I try to update It tells me the macOS Catalina download is damaged and can't be installed. What now?
When I try to up date my Mac it says the macOS Catalina download is damaged and can't be installed. What now?
MacBook Pro 13", macOS 10.13
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At the Catalina App Store page does it say 'Open' or 'Get'. If it says open the App Store is detecting a copy of Install macOS Catalina.app. Look in your Applications folder, if you find it move it to the Trash, empty the Trash.
Connect your mac to your router using a cabled connection. Restart your mac, open the App Store Catalina
page it should now say 'Get' press that to start the download. Don't use the mac while it is downloading,
and if you have other devices that share the same internet connection don't use them either.