This copy of the Install macOS High Sierra application is damaged, and can‘t be used to install macOS"

sandaaddapetel wrote:

I tried to upgrade my MacOS 10.12.6. to macOS High Sierra 10.13.6 but I received this message " This copy of the Install macOS High Sierra application is damaged, and can‘t be used to install macOS" Could someone assist ? Thank you

Delete the installer, empty the trash and download a new installer...

If your download speed is suspect get on a faster network.

The older macOS installer on this server:

How to download macOS - Apple Support

sandaaddapetel wrote:

Many thanks for your inputs.

I learned that I require to install macOS 10.13 before updating to 10.13.6. The challenge I have now is that I could not locate the link to the installation file for the 10.13.

Any idea?

Here is how to get the macOS 10.13 installer: How to download macOS - Apple Support