I am runnibg MacOS 10.13..6 on a late 2013 iMac. How do I upgrade to Mojave?

If you get a corrupted message...

Naw, not damaged, it's just that you have an old copy already in Applications, there are 2 cures...

Disconnect from the Internet & set the Date back to 2014, then you can run the Install MacsOS Mohave App in Applications, so expired Certificates are not expired.

Or... trash the Install MacsOS Mojave.app in Applications then a new copy can be downloaded.

Hi Heb,

Try downloading & installing this in Safe Mode, but not using Firefox...

https://itunes.apple.com/us/app/macos-mojave/id1398502828?mt=12

Safe Boot, (holding Shift key down at startup).

Give this a spin. It's worked for me in the past. YMMV.

xattr -cr /path/to/Installer.app

That's a great ti if it works... what does it do? :)👍

It basically removes any/all extended attributes recursively.

You're welcome, take care my friend! :)

Thank you. :)